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SAD Tecmark Pressure Switch 3903 BP Pressure Switch Tecmark SPST 1 5 Psi 3 Amp 1/8" NPT P13869560SAD-3903-BP https://cdnimages.opentip.com/full/SAD/SAD-3903-BP.jpg Tecmark Pressure Switch 3903 BP Pressure Switch Tecmark SPST 1 5 Psi 3 Amp 1/8" NPT Manufacturer Part Number: 3903-BPTecmark Pressure Switch 3903-BPCommitted to quality, delivery and serviceTecmark Series 3000, 3900 and 4000 Pressure Switches convert a positive or negative pressure signal (range 2\" W.C. to 100 PSI) to an electrical output. Tecmark Pressure Switches are available in various configurations for air, gas and liquid sensing applications. Tecmark switches can sense pressures as low as 2\" w.c. up to 100 PSIG with electrical ratings up to 25 amps.Additional Information Inlet Size/Outlet Size 1/8" NPT Thread Material Plastic Amperage (Amps) 3 Alternate Part Numbers5-20-0008 13869560 0.4100lbs 0.00 0.00 0.00
Tecmark
21.7600 2027-07-09 47 In Stock
customer review - by , December 12, 2025
5/ 5stars
Works great and easy to use. I would definitely recommend.
customer review - by , December 12, 2025
4/ 5stars
Pressure could be higher but nosels are very easy to switch out.
customer review - by , December 12, 2025
5/ 5stars
Easy to assemble and use! I never knew I needed a pressure washer until receiving this!!
customer review - by , December 12, 2025
5/ 5stars
I use this electric Sun Joe pressure washer to clean cement patio, wood decking, cars and truck and vinyl fencing. It does an absolute great decent job. No water leakage on washer, motor cuts off when releasing handle pressure, light weight, easy to move, and 5 nozzles for any type of job.. Had only previously experience using gas pressure washers. Now at 70 and with two hip replacements I found the back pressure on the handle wand on the gas pressure washer too much and gas pressure washer too loud and too heavy. The Sun Joe is just what I needed, and my wife as she used it to clean her car. Assembly was easy with easy to read and follow instructions.
customer review - by , December 12, 2025
2/ 5stars
Worked for two years of very low use then broke. Unable to fix. Spend more money for something that will last.
customer review - by , November 11, 2025
5/ 5stars
Best buy
customer review - by , November 11, 2025
5/ 5stars
Great power washer ! I would recommend!
customer review - by , November 11, 2025
5/ 5stars
Bought mine in Dec 3 2016 and used it all the time to clean vehicles, concrete, siding and all kinds of equipment on the ranch. The motor just gave out and am buying another one. Great machine
customer review - by , October 10, 2025
5/ 5stars
Purchased original in 2019...6 years of use and it finally quit. So purchased a new one, same model. Easy to assemble and put it to work quickly. Works great, no issues, hopefully this one will last as long as the first.
customer review - by , October 10, 2025
5/ 5stars
Does what it was made for. No problems using this machine n t does a great job.PS easy to use

Tecmark Pressure Switch 3903-BP Pressure Switch, Tecmark, SPST, 1-5 Psi, 3 Amp, 1/8" NPT

stars Rating 4.5 | 471 reviews
Brand Tecmark
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SKU: SAD-3903-BP
Price: $21.76
Quantity:
47 In Stock
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Product Description

Manufacturer Part Number: 3903-BP

Tecmark Pressure Switch 3903-BP

Committed to quality, delivery and service

Tecmark Series 3000, 3900 and 4000 Pressure Switches convert a positive or negative pressure signal (range 2" W.C. to 100 PSI) to an electrical output. Tecmark Pressure Switches are available in various configurations for air, gas and liquid sensing applications. Tecmark switches can sense pressures as low as 2" w.c. up to 100 PSIG with electrical ratings up to 25 amps.

Additional Information



Alternate Part Numbers

  • 5-20-0008

warning tips WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.

Product Warranty

This item has 15 months warranty.

Note

This product is not eligible for coupon code discount, for we've been offering the best price in the market.
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Customer Reviews
By Jeanne Leonard
Date: December 14, 2025
Pressure could be higher but nosels are very easy to switch out.
Rating: 4 stars [4 of 5 Stars!]
By derek lambrix
Date: October 03, 2025
Nice washer cleans everything I did add an extension wand the one it came with was a bit small but works great
Rating: 4 stars [4 of 5 Stars!]
By nalaha
Date: July 01, 2025
Not as strong as gas powered but pretty good for electric
Rating: 4 stars [4 of 5 Stars!]
By JoeModz
Date: June 07, 2025
Makes washing the cars and house almost a fun task. I dinged it one star because the tanks are darn near useless with how bad the tubes are kinked out of the box. I just use a garden sprayer to apply anything worth applying. Other than that it accepts all normal pressure washer fittings and has worked quite well for season 1.
Rating: 4 stars [4 of 5 Stars!]
By Bob
Date: April 25, 2025
10/2018, bought the SPX3000 (2,030PSI, 1.76GPM) and the 25' extension hose (SPX-25H) for $182 total: used approx 2X/yr -but when used it was for extended runs cleaning decks/concrete and other misc stuff at my home and homes of a couple relatives. Not as fast as a gas PW, but got jobs done OK. I used a silicone tie to pin the trigger on, and controlled the PW with the on/off switch: this saved my hand that would cramp up squeezing the trigger on long runs -and based on my research cycling PW's on/off should be avoided. I ran water through the wand with no nozzle for a couple minutes to fully purge the lines before starting -this prevented cycling. Also, always used Briggs Pump Saver when stored for long periods. So, my PW was well maintained and got 7yrs out of it, or $27/yr. Electric is right for my use: light/small and easily moved/transported. New models with hose coils seem like a nice improvement -my SPX3000 was tippy with the extra 25' hose wrapped around it. BTW: Strongly recommend buying the 25' extra hose. If you don't, will wish you did. My SPX3000 died unexpectedly. Had used it 2 days prior. Fired up, worked fine a couple minutes, then flow stopped with the pump still on. Troubleshooting revealed flow wasn't getting thru the PW, so out of curiosity disassembled the pump. No catastrophic failure found: one pump stage had bound up which prevented water passing through. Did not plan to fix/reassemble -Sun Joe doesn't sell parts. Kind of OK with 7yrs out of it, based on low price and HD rents electric PW's for $48/day. Appears that the SPX3000 spec changed to a lower GPM: Mine was rated 2,030PSI, 1.76GPM, and now rated for 1.2GPM. My SPX3000 was OK -longer lifespan would have made me a fanboy. Don't need a PW until spring 2025. If a smoking SPX3000 deal is offered, then I may consider another. Otherwise, willing to pay for better durability/lifespan, so taking my time and looking at other electric PW's like the Stihl RE110 Plus.
Rating: 4 stars [4 of 5 Stars!]
By Lucas D.
Date: April 19, 2025
Handle snapped off, along with connection to the fluid reservoirs. Tank was empty, without any water in it, so not exactly heavy on its own, just a cheap made product.
Rating: 4 stars [4 of 5 Stars!]
Items 1 - 6 of 68 reviews
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