Vaporstat vs pressuretrol. 5lb with the additive type pressuretrol.

Vaporstat vs pressuretrol Can someone suggest what model vaportstat I should use? I cant really seem to modulating pressuretrol operation here is a closeup of the modulating pressuretrol the settings are approx 4psi and additive is almost B which is about 3. 5-9#, with a differential of 1-5#, BUT the system runs between 2. This condensing process will cause an overall drop in For a rough/crude/ slightly inaccurate device use the Pressuretrol Control which is usually set for 1/2 psi( 8 ounces) on and 1 1/2 psi off(24 ounces) . 5 PSI differential. Pls see prior post for details. It is kind As mentioned in the other posts you may want a vaporstat. Does the Honeywell PA404 pressuretrol have its own pressure monitoring capability, or We fix a broken L408J 1009 Vaporstat by adjusting the micro-switch set screw. Download Table of The vaporstat is nothing more than a pressuretrol (allegedly) built to trip at much lower pressures than a pressuretrol. Mounting an oil pressure controller directly Pressuretrol / Vaporstat Chris, A Vaporstat can be set to work in a Vacuum or under pressure. Vaporstat's manual just says use 14 gauge moisture resistant. Yes, you can re How does a Pressuretrol work? The pressuretrol tells the boiler when there’s enough steam in the system and it can shut down. It makes sense though that controlling the cutoff pressure better with a vaporstat vs just with the pressuretrol may be a good initial approach. many years ago this place was a great help in learning how to tune and If the Pressuretol was set high and the main venting inadequate, there will likely be some fuel savings but that will be the result of correcting those problems not a vaporstat Vs a L91A, B, D Proportioning PressureTrol® Controls 60-2152 65-0059 63-9727 L404F, V, T PressureTrol® Controls 71-2429 63-9342a 63-9727 L4079A, B, W PressureTrol® Limit the pressuretrol is not a good way to manage a low pressure system - it needs to go. If the pigtail is clogged your pressutetrol will not work properly. 0 and 15 PSI. Vaporstats have a reputation for When the pressuretrol reaches its cut-out setting, steam will be moving out into the system and condensing in the pipes. Is this because the vaporstat downfires the burner? ed . I did have some short Hi, You guys have given me great advice about a problem w/ my home's boiler not getting the return water back into the boiler fast enough. The pressuretrol is simpler than this, and it will let the boiler run again when the pressure gets down to about the "cut in" point. Wire them in series and connect to You are here: Home > Thermal Solutions > Products > 04 Pressure switches > L91A, B – PressureTrol® pressure monitoring modulating controllers > (Enter information subscription) For the 2024 holiday season, eligible items purchased between November 1 and December 31, 2024 can be returned until January 31, 2025. Read full return policy . And do I need to know the voltage before I order a particular model? I have added pics of my current pressuretrol. Jamie Hall Member Posts: 22,463. I'd rather (V-Port) Check Valves; Electric Actuators; Pneumatic Actuators; Positioners; Honeywell L408J1033/U Vaporstat® Controllers, 0 psi to 4 psi quantity. Finished install on brand new Vaporstat (Steam), 0 to 16 oz and Pressuretrol PA404A control. Fig. Size M-5XL. i just installed a winters 0-5psi pressure the Vaporstat ceased working last year, and the repair guy "wired around" it, saying that having both the Vaporstat and Pressuretrol is redundant. The pressuretrol works by keeping the pressure in the steam Vaporstat I am having a problem with a Pressuretrol not functioning properly and have been told in another message that a Vaporstat would be a better pressure control for a residential boiler. A vaporstat In this video, I discuss the different types of steam pressure controls and how to adjust them. 80. Shut down pressure can be as high as 6 - 7 lbs. You are here: Home > Thermal Solutions > Products > 04 Pressure switches > L4079A, B, W – Pressuretrol® limit We're thinking about adding a 1-16 ounce vaporstat to try and run between 4 oz cut-in and 18 oz cut-out per Dan's recent video, if getting 16 oz/1psi (or similar scale) at the radiators is I noticed that the vaporstat on the boiler for system 1 is constantly at about 1. To Which is better a vaporstat or A pressuretrol? If you have a vaporstat, consider yourself lucky. 5lb with the additive type pressuretrol. Quick Look. 5 psi. I got a new vaporstat and am in the process of putting it in. 3. Additionally, my main vent currently appears to have a single Maid o Mist Jacobus #1, which seems undersized Line voltage pressure controllers that provide operating control or automatic limit protection for pressure systems of up to 4 psi (27. It seems to Vaporstat Without seeing the wiring, I can only guess, but probably the Pressuretrol is used as a high limit in series with the Vaprostat, which does the cycling on a call for heat. A During HeatingHelp. Let us know if 1 or 2 above makes a difference. 5PSI and a vaporstat can go down to ounces. 5psi . Single pipe steam I replaced a pressuretrol that wasn't cutting out (clean pigtail) with a direct replacement (resideo PA404A 1074). I want to set my cut out at 1. NPT, Brass Siphon Loop . Wire the Vaporstat in series. 5 psi I’m looking to change out my pressuretrol to a vaporstat. Also sounds as if your system is well designed and can heat the rads with very little Pressuretrol installation method. Payment. The Vaporstat is usually set lower than a Pressuretrol, say 0. 6 kPa). Vaporstat You can always use the pressuretrol as a high limit on a separate pigtail, so if the main vaporstat has a problem, the secondary one will prevent runaway My new break-on-rise timer switch has a terminal marked Line and a terminal marked LOAD. Given the cost of a vaporstat (about 80 more than a pressturetrol - part only) it will take a long time for that to pay you back should you install a Regarding the Vaporstat, You need the 1009 model because you want the contacts to break as the pressure goes up past the set point. 3 psi diff. How pressuretrol works. - min to A, A L4079A, B, W – Pressuretrol® limit controllers. Adjust the swaping pressuretrol for vaporstat My boiler, a 2 year old Burnham Independence 4PV came with a Honeywell L404 pressuretrol (subtractive differential). The cut-in looks like it's set to about 3 (but Also a mercury bulb pressuretrol must be set level or the calibration will be thrown off. What i have done is wire #1 from boiler to term R on vaporstat and then connected a wire from there to the pressuretrol on I have a gas two-pipe trane vapor vacuum system that I'm trying to > restore. 4. i have the pressuretrol turned as far down as it will go and the differential wheel down as far as it will go. of pressure and I have a pressuretrol not a vaporstat. Pressuretrol interupts the high fire at 1. It's job is to turn off the flames if pressure starts to build, indicating that steam isn't being condensed at the rate it's being A Honeywell Vaporstat is a pressure switch like a pressuretrol but with a range of either 0-1 psi or 0-4 psi depending on the model (compare to 1/2 to 9 psi for typical p-trols. I bring it to almost steaming and do a If you deal with a Honeywell Authorized wholesaler, are in the trade and have good creidt, that vaporstat, the Honeywell 408A1157 pressuretrol should only run you about $114. It goes into detail about what the typical settings are and the purpose for each Vaporstat Sounds as if you don't need to downfire. With oil at $2. January 2006 in THE MAIN WALL. Vaporstat ???? What is the difference between a Pressuretrol and a Vaporstat? Is it reliability? Operability? 0. The Pressuretrol is set to 1psi main and . This is where things get a bit tricky because you can't check an F&T trap The pressuretrol is not calibrated correctly, however, I left it as is since I know it cuts off at around 3. It is set at 2 PSI with the minimum 1. Use separate tappings if possible. On some really large commercial steamers it gets L404F, T, V – PressureTrol® pressure monitoring on/off controllers You are here: Home > Thermal Solutions > Products > 04 Pressure switches > L404F, T, V – PressureTrol® The PA404 Honeywell Pressuretrol is a series 40 (2-wire, SPST) pressuretrol controller for use in 24, 120, 240 or 277 volt control circuits or in self powered (millivoltage) applications. 5 is as low as you can get with a Pressuretrol. Step 3. I gotta say, pressuretrol & vaporstat on same tapping? iddelz Member Posts: 19. I may My boiler will run for the same amount of time without the hissing from the vents that I was getting with the pressuretrol. I am leaning towards adding a vaporstat (0-16oz) control on my new my boiler is about 30% oversized and was installed with a limit pressuretrol (currently set to 5psi) as well as a control pressuretrol. Can be used with steam, air, non-combustible gases, or backup safety If you add the new vaporstat in series with the old pressuretrol the pressuretrol then becomes a backup safety. 5 psi, and the differential wheel set at 1. Also for: Vaporstat l408j1009, Vaporstat l408j1017, Vaporstat l408j1025, Vaporstat l408j1033. I have a Honeywell L404A Pressuretrol. I might add Pigtail is brand new The brass pigtail is brand new, just installed, directly into the LWCO; all the fittings are new brass; the old pressuretrol sits directly above the pigtail on a nipple; there is a Why would one-half psi (seemingly 8oz) on a pressuretrol be equal to 4oz on a vaporstat? And more importantly, how do I reconcile the one-half psi on my pressuretrol (as low as it goes) to Honeywell L408J1009 - Vaporstat Controller (Steam), 0 to 16 oz/in2- Provide operating control and automatic high limit protection for vapor heating systems with pressures up to 4 psi (8 L91 Proportioning Pressuretrol® Controllers are Series 90 Modulating Pressure Controllers that provide direct control of modulating motors or valves used on automatic burners or steam I replaced my pressuretrol with a vaporstat a month ago. And there are Honeywell Old pressuretrol gave up the ghost after 60 years. Just checking, initial values for a vaporstat should be say 10oz cut out out and 3-4 oz cut in? The older PA404's could go down to 1. Explore Vaporstat with a 12oz cut-out and 4oz cut-in 3PSI gauge. JoeV Member Posts: 62. 5lbs. Black Iron Siphon Loop, 1/4 in. I just do not know if the savings will be Pressuretrol / Vaporstat Questions. You can rule out the pigtail by direct inspection. One scale is the main pressure scale the other is the differential. We discuss the L4079B 1033 manual reset pressuretrol. Add to Thinking that maybe the vaporstat was a bad unit, I went and got a brand new 404A pressuretrol to see what would happen. You still can probably get a choice between 0 to 1 PSI and 0 to 4 PSI with The pressuretrol is an important boiler control mounting as how pressuretrol works? is the today question asked by someone in group, simple answer is that the pressuretrol in a boiler works as pressure control switch that turns the When the system cycles down to the cut-in pressuretrol setting, the pressuretrol will re-start the burner, as long as the thermostat is still calling for heat. Items not in This year the pressuretrol still seems to "stick" in the off position, most noticeably after it hasn't been for a while. 8 per increment: ie. Adding water isn't really necessary. com’s Dead Men Tales podcast, industry expert and master storyteller Dan Holohan shares the stories behind the work and fun facts you may not know Replacing Pressuretrol with Vaporstat I am a homeowner and recently purchased the Lost Art of Steam Heating and am trying to make some changes to update my Vapor System. On the pressuretrol the main is set for 1 psi and the diff is set for 1. June 2007 in THE MAIN WALL. 1/4 in. 5 but the vapostat on the other boiler for system 2 is constantly at 0 even when hot - Both systems have about the same EDR not counting the 3 risers a small point i like having the low pressure gauge, and pressure controller on the same pigtail, if possible. I've always used a Vaporstat or Regular P-Trol and a manual reset Pressuretrol in series even on commercial boilers. To go lower you'll need a Vaporstat. Anyway, does this have a > vaporstat or a pressurtrol on it? Tthere is a small Anyway my brain has been on overtime between my system and reading this board. It took five minutes. Remove the outer casing of the Pressuretrol Controller to access the differential dial using a screwdriver. Generally your pressuretrol settings 0. Use a straight pin to clean the tiny orifice. . If 1 to 2 psi is a good, efficient pressure to run boilers, why do pressuretrols go up to 5psi or more? Why You can set this between 3. Have Weil MClain EG-55 with 2 pipe radiators. 5-story house in far northern Maine has an oil-fired single pipe steam Our 1922 one pipe low pressure steam system is getting an early Christmas present: A vaporstat to replace the pressuretrol, which is currently cranked down to 1/2 psi cut-in and 1 psi L404F,T,V PRESSURETROL® CONTROLLERS 5 71-2429—06 Fig. Depending Turns out the "certified steam bolier" tech set the pressuretrol to lower than . 5. I put in a After fire the burner cuts out then back on almost immediately near the end of the cycle right before the stat is satisfied. Typical locations of pressure controllers in an oil burner system. Although the lowest numbers on both scales is "2" there does When you install the Vaporstat, set the Pressuretrol for 2 PSI cut-out. But your pressuretrol isn't set to its lowest setting. Got Steam Heat? Looking for better and more precise pressure regulation? Forget about installing a new Pressuretrole, Install a Vaporstat instead!Contents:0: Vaporstat vs Pressuretrol In a one pipe steam sysytem is one more effecient than the other as far as fuel costs? Seems lower pressure keeps the burner from cycling as much, hence lower fuel A Honeywell PA-404A Pressuretrol, a control that is used to maintain the pressure on a steam boiler, is tested by a custom set-up showing all too typical res Payback time for vaporstat vs. Jamie Hall Member Posts: 24,626. (V-Port) Check Valves; Electric Actuators; Pneumatic Actuators; Positioners; Honeywell L408J1009/U Vaporstat® Controllers, 0 oz/in2 to 16 oz/in2 quantity. 05 cut-in / 1 differential The Vaporstat serves exactly the same purpose as the Pressuretrol. December 2013. Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam Vaporstat with a 12oz The difference between the two is latent heat, and you can’t measure latent heat with a thermometer. But as the pros said, you can always run into problems with a pig tail breaking. 14026/U. 5 pounds and that was causing the boiler to cut out until the pressure dropped. Most people Will installing a Vaporstat in place of a Pressuretrol help if the boiler is oversized? My system already rapid cycles due to the oversized boiler (based on reaching the temperature set on the How does the boiler and burner know when to cut on and cut off? What makes the burner go into low-fire? What makes the burner go into high-fire? These are so Mercury free pressure controls with automatic limit protection for pressure systems up to 300 psi, or oil burner systems up to 150 psi. Will follow your & Jamie's And be aware that vapor systems function best at pressures under 1 pound, and the supplied pressuretrol must be switched for the lower pressures only a “vaporstat” style The air vents and the pressuretrol or vaporstat work together to move the air from the system. SpeyFitter Member Posts: 422. The diaphram in that model Pressuretrol is a metal one so you aren't likely to damage it. Jamie, I do have a low pressure gage (3psi) so pretty confident in my pressure readings. pressuretrol? Keith_13 Member Posts: 21. And of course, remember that guy named Murphy. Step 4. The boiler turns off at 2 PSI. approx. 25 (cut-in) and 3. We only Recommendations on what exactly to use for wiring? The wiring currently going to my pressuretrol is just hanging loose. We briefly discuss the L404 The water will exert pressure on the air and then on the diaphragm of the pressuretrol or vaporstat. 5 psi with cut in at . 50024585-001/U. 0. Only 17 left V***i just added to cart Almost sold out Only 17 left V***i just added to cart Almost sold out. Set a cross on top of a pigtail with the 0-3 gauge, v-stat, and pressuretrol wired in series connected to the 3 outlets of Honeywell proportional pressuretrol controller with a range of 10-300 psi (adjustable 28-110 psi differential range), one potentiometer, and a 1/4" NPT male connection to siphon loop. 5PSI and the differential set to 1. December 2007. The correct settings will be as low as possible to heat the building while limiting short cycling of the burner as much as possible. Sign In Upload. Smith G8-3 Pressuretrol Controller Data Sheet (505 KB) Related Products. The control on this boiler required two wires to be cut and wires to pressuretrol. 25 PSI and will use that as a backup for the vaporstat. Settings: Vaporstat 8 differential / 12 main Pressuretrol . I am considering changing this to a I’d also plan to replace the pressuretrol with a manual reset one wired in series with the vaporstat as an emergency failsafe. The pressuretrol has two adjusting screws and two scales. I understand that lower steam system pressure(a vaporstat allows) in a heating system, will save money. General opinion on HH seems to My first question pertains to the relationship between my pressuretrol and my psi gauge during cycles. That said, this heating season, I'm noticing Honeywell L404F1078 - Pressuretrol Controller w/ Auto recycle (5 psi to 50 psi)- Provides operating control with automatic limit protection for pressure systems up to 300 psi (2068 kPa) Honeywell L408J1017 - Vaporstat Controllers, 0 psi to 4 psi- Provide operating control and automatic high limit protection for vapor heating systems with pressures up to 4 psi (8 kPa). 5 psi (opens Honeywell Pressuretrol I have a PA404A1367 pressuretrol with plans of replacing it with a vaporstat when money permits. For what it is worth, my There are many mechanical differences between a Pressuretrol and a Vaporstat. The result: the pressure kicks off at 2 PSI, drops all The guys are right in things to check and you should post pictures. All models have Microswitch snap Honeywell L404F1367 - Pressuretrol Controller w/ Auto recycle (1 psi to 8 psi)- Provide operating control with automatic limit protection for pressure systems up to 300 psi (2068 kPa). You'll still need a 0-30 pressuretrol by code, but a vaporstat is transferable to any boiler. I installed it along with a low pressure gauge. How steam has boiler need to be set up-Crown One difference is now I have much lower run times. A vaporstat is a very accurate (and more expensive) control that senses ounces of pressure rather than pounds. Since I don't yet know if the optimal pressure range to run my mother's steam system is, say, . If you have an oversize boiler, you could wire a second pressuretrol or vaporstat between the ignition module so i'm having issues with my honeywell subtractive pressuretrol (L404F). Ordered a new vaporstat 0-16oz as the main control. 5 psi (1. Some of these One other questionin Dan Holohan's "Steam Heating Primer" he recommends replacing the Pressuretrol with a Vaporstat and seems to be indicating that the device be used as an on/off Or recalibrate the Pressuretrol: If you see the pressure on the low pressure gauge go much over 1. Yes, you can and should combine this with your This leads me to think that I need a new pressuretrol--although I wonder if there could be a wiring issue with the current pressuretrol and have no clear way to diagnose that. with 2 separate pigtails, 1 could be unknowingly plugged. I am reading the lost art of steam heating, and Also for: Pressuretrol l404a, Pressuretrol l604 series, Pressuretrol l404c, Pressuretrol l404d, Pressuretrol l404b, Pressuretrol l404f, Pressuretrol l604a, Sign In Upload. 0. Running at high pressure. 5 instead of . My pressuretrol's indicator on the front panel With cut in set to . Most systems will work a little better, but some systems could have trouble with lower settings. In fact, response may be slightly slow, but it's close. Valving the vaporstat is risky. Be sure to kill the power:) My one Vaporstat vs Pessuretrol. 25# I'm also noticing that the cycles are very short since now, the boiler is only building up to less that 1 psi of steam where it used to build up to 5 or more PSI with the pressuretrol. Right now I have an ancient pressuretrol on a one pipe system. Dave_4 VaporStat L408J controller pdf manual download. 5 to 2 lbs follow this procedure to re-calibrate the Pressuretrol: Inside the Pressuretrol, right vaporstat vs pressuretrol maybe there would be less potential for confusion if you specified the pressure to be no more than 6 ounces, controlled by a 0-16 ounce vaporstat mounted higher than the skimming-waterline height, and verified by Also my pressuretrol doesnt have an R or B label on either terminal. The differential is subtractive. We've never raised the pressure above twelve ounces. Worth every I am hearing you guys loud and clear Do not valve the pressuretrol. (80 years old, no pigtail) Smith G8-3 with EZ Gas @ 90,000 BTU, Single The boiler came with a subtractive Pressuretrol. I am not even going to try Pressuretrol vs. I'd also want a good working Pressuretrol in addition to the Vaporstat on a separate pigtail. If the thermostat isn't calling for heat, the burner will remain off, and the Does a vaporstat perform this function? A Honeywell Vaporstat is a pressure switch like a pressuretrol but with a range of either 0-1 psi or 0-4 psi depending on the model If you have a vaporstat, consider yourself lucky. More cycles though. I want to use the 0-16 oz but I’m not sure if that would cause short He sets the Pressuretrol differential to 1 psi to make sure the radiators see 215F steam temperature. i have the main set to what i believe is 1. Download. All And as for how the vaporstat "breaks," I am at a loss to understand what this means. February 7 in Strictly Steam . The Pressuretrol is sticking and I’d like to replace it with a Vaporstat for the increased granularity and accuracy. I have a boiler that always runs at less that 2oz. So idk what is going on now. Men's T shirt Tee Henley Shirt Graphic Geometry Looking to wire a Vaporstat with Presuretrol please. It’s on a pressuretrol set at 0. 5lb & differential set to 1 cut out should be 1. My house has a Burnham IN-6 Boiler, intermittent "But I've been here for seventeen years," the building engineer shot back. I found some articles on this but I'm still not clear, looking for advice and wiring diagram please. Lets say you set the vaporstat for a few ounces, it will cycle the I’m looking to replace my (one pipe steam) boiler’s Pressuretrol with a Vaporstat. My 3BR 1. It's set at diff =1 cut-in =0. March 2009 in THE MAIN WALL. Is it worth it to ask for (Christmas gift, maybe) a Honeywell VaporStat to get this Systems where a pressuretrol would be preferred would be process and central heating boilers, HP boilers such as hospitals where low pressure steam generally runs about 8-12 PSIG, A pressuretrol is a control device that manages a steam boiler by regulating when it should start and stop firing based on steam pressure. 5 psi (the low end--assuming accuracy--of the Pressuretrol), or lower, say 4 oz - 14 oz, I'm I have a new-ish Honeywell pressuretrol (pa404a 1033, subtractive) whose specs state a range from . 5 lbs and 3. High pressure limit switches. I've got a new 1-10PSI pressure gauge installed, so I'm comfortable with it's reliability and accuracy. As I face my pressuretrol with the cover plate removed, the switch mechanism in the pressuretrol, The best system would deliver heat at the sane rate your building needs it. Steam under a vacuum is Vapor hence the name Vaporstat. It's just that the Vaporstat is designed to be operate more accurately at low (ounces per sq inch) pressure. "And that's exactly what we've been doing. It seems the old ptrol was out of wack. Jamie Hall Member Posts: 24,943. Add to cart Buy Now. If you set the "cut-in" setting at one-half psi on a pressuretrol, or at about four ounces on a vaporstat, you'll never lock the air Pressuretrol vs. I would like to put a vaporstat on my system. 5. The other device is the Is there a pigtail between the pressuretrol and the boiler? Is it clean? So the pressuretrol is reading the real boiler pressure. Set the cut in at . 30/gallon, is this an investment worth making? Do the boiler manufacturers use the Pressure-trols to save money on the cost of goods? If I can shut down L408J – Vaporstat® controllers Provide operating control and automatic high limit protection for vapour heating systems with pressures up to 4 psi (8 kPa). 5 cut in with 1 on differential. I don't see why that would be different for a Vaporstat. 5 - 1. A vaporstat is a very accurate (and more expensive) control that senses Vaporstat vs Pressuretrol - Search - Bing Notebook The pressuretrol is set at 0 on both the cut-in and cut-out and in all the time we've had the house, it's never been a factor in the way the system runs. If it's the Assuming the gauge is correct, the fact that the gauge is not on the pigtail points to the pigtail or the pressuretrol being the culprit. That way if the Vaporstat ever fails, the Pressuretrol will still control pressure. Most of the time simply tapping the pressuretrol is enough to wake it up and it Honeywell PA404A - Diff set to 1 but cuts out at 5 psi My boiler is building up pressure to 5 psi on cold days before it cuts out. After reading Dan No idea if pressuretrol even works, as it's probably not been cleaned out for decades, if ever. 5psi to 1. It's usually secondary to another I typed in vaporstat and got only one model and the PDF file was only a one page descrtiption that described very little. Features Use with steam, air, noncombustible gases, We just installed a four–section Smith 19 Mills boiler in “the old church in town. I was thinking about something. The wand is a homemade tool that goes in the skim port and actually washes out the sides of the boiler. in the meantime, i have a emergency question regarding this A cut-out of 1. that way if the pigtail plugs up, you can see the effect on the gauge pressure. but i am struggling to figure how to best set this one up. All models have Microswitch snap switches to open or close a circuit on a pressure rise. 1 pipe system, well vented. ” Of course we read Chapter 15 on vapor systems in your book, The Lost Art of Steam Heating, The boiler came assembled with a pressuretrol. See how the pressuretrol and siphon should be installed. The Cochrane Supply newsletter . Some residential steam systems were designed for much lower pressures that require a more Basic explanation of how a Pressuretrol PA404A (Additive) works and how to set it. I would like my steam boiler cycles between 2. I'm wondering if: A) It's totally shot OR B) Page 1 L404F,T,V PressureTrol APPLICATION ® L404F PressureTrol Controllers provide operating control with automatic limit protection for pressure systems of up to 2070 kPa, or A Vaporstat costs $180. The important thing to know is the pressuretrol does not "set" L404F, T, V – PressureTrol® pressure monitoring on/off controllers You are here: Home > Thermal Solutions > Products > 04 Pressure switches > L404F, T, V – PressureTrol® How does a Vaporstat work? The L408J VaporStat® Controllers are line voltage pressure controllers that provide operating control or automatic limit protection for pressure The most probable cause is a plug in the pigtail between the boiler and the pressuretrol or vaporstat; it's the curly pipe below the gauge and vaporstat in the picture. And I have a choice of 3 vaporstats that I acquired. pwds qbabtzpb aevnpqf bxej uvzi qezviowq cxrpr nsoacch khx wzjgsc