Model # 374A

Internet #100532582

Store SKU #816403

null 3/4 in. Cast-Iron Water Pressure Safety Relief Valve
0098268678833

3/4 in. Cast-Iron Water Pressure Safety Relief Valve

$2478 /each
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Product Overview

The 3/4 in. Cast-Iron Water Pressure Safety relief valve is used in hot water boiler applications to protect against excessive pressure on all types of hot water heating boiler equipment. It consists of an iron body construction with forged bronze inlet connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. It resists corrosive water conditions, sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief and not as an operating control.

California residents: see   Proposition 65 information

  • Standard pressure setting 30 psi (206.9 kPa)
  • Pressure range in 5 psi (34.5 kPa) increments from 30 to 150 psi (2 to 10 bar) with corresponding high ratings at 550,000 BTU/Hr
  • Iron body for strength and long life
  • Easy to install

Info & Guides

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Price
$24.78 /each
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Name 3/4 in. Cast-Iron Water Pressure Safety Relief Valve 1 in. x 1 in. Brass FPT x FPT Anti-Siphon Air Admittance Valve 1/2 in. Brass FPT Feed-Pressure Regulator 1/2 in. Cast-Brass SWT x SWT Dual Check Vacuum Breaker with Solder Ends
Brand Watts
Ratings (25) (1) (17) (1)
Valve Outlet Diameter (in.) .75 1 .5 .5
Connection FIP FIP x FIP FIP Sweat x Sweat
Valve Inlet Diameter (in.) .75 1 .5 .5
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Specifications

Dimensions

Product Depth (in.)
4
Product Height (in.)
2
Product Length (in.)
1.5 in
Product Width (in.)
2.5
Valve Inlet Diameter (in.)
.75
Valve Outlet Diameter (in.)
.75

Details

Compatible Pipe Material
Brass
Connection
FIP
Indoor/Outdoor
Indoor
Material
Cast Iron
Maximum Pressure (psi)
30
Maximum Working Temperature (F)
180
Product Weight (lb.)
1.14lb
Returnable
90-Day
Valve Type
Air Admittance

Warranty / Certifications

Manufacturer Warranty
Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment.

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Customer Questions & Answers

Can the valve get mounted horizontally?

Can the 374 mount sideways to point down with the discharge?
Asked by: PatT
yes. I don't think it matters.
Answered by: toejoek
Date published: 2017-03-29

May i use it heating sistems ? Boiler?

Asked by: Chitto
Yes thats where mine came from, I think this is a standard part and lb rating.
Answered by: TV
Date published: 2017-03-29

Indicated that the pressure range is adjustable in 5 PSI incriments how is it adjusted.

Example how would I adjust this item to 35 PSI
Asked by: Anonymous
Its not adjustable, the spring inside is set for 30 lbs.
Answered by: TV
Date published: 2017-03-29

What is the BTU rating of this relief valve?

Asked by: VAOR
550,000 BTU/HR. rating, I got this right off of the tag that comes on it.
Answered by: JollyRoger
Date published: 2017-03-08
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Customer Reviews

3/4 in. Cast-Iron Water Pressure Safety Relief Valve is rated 4.1 out of 5 by 25.
Rated 5 out of 5 by from Working on my furnace seemed daunting at first, but after viewing this product it seemed easy eno... Working on my furnace seemed daunting at first, but after viewing this product it seemed easy enough to change. This part WAS easy to remove and replace. It was also very easy to locate this product on the Home Depot website. I simply entered the part # I found on the old valve (1979 furnace) , and I found exactly what I needed !
Date published: 2017-02-15
Rated 2 out of 5 by from These valves start leaking after 2-3 years. I've replaced several of them. I've replaced expans... These valves start leaking after 2-3 years. I've replaced several of them. I've replaced expansion tanks and intake pressure values, etc. chasing the problem, but it turns out to be these valve rust and leak. I'm looking for an alternative brand, and willing to pay more for one that lasts 10+ years.
Date published: 2017-02-20
Rated 5 out of 5 by from Great product. I bought it for $25.00 and replaced the leaking one myself in 10 min yesterday and... Great product. I bought it for $25.00 and replaced the leaking one myself in 10 min yesterday and it works perfectly. It costed me more than $300.00 to have a plumber finish the same job several years ago.
Date published: 2017-05-26
Rated 5 out of 5 by from This relief valve was easy to install. On my installation I needed to use a 3/4" x 2" threaded ni... This relief valve was easy to install. On my installation I needed to use a 3/4" x 2" threaded nipple because my old valve had a male end where this one is female.
Date published: 2017-03-28
Rated 5 out of 5 by from Great price for a name brand part. Easy install, Worked Great ! Great price for a name brand part. Easy install, Worked Great !
Date published: 2017-03-29
Rated 4 out of 5 by from Good part. But the price is a little high. ... Good part. But the price is a little high.
Date published: 2017-05-09
Rated 1 out of 5 by from 1 Star Review Rating provided by a verified purchaser
Date published: 2017-04-22
Rated 4 out of 5 by from 4 Star Review Rating provided by a verified purchaser
Date published: 2017-04-20
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