Watts 3/4 in. Cast-Iron Water Pressure Safety Relief Valve-374A at The Home Depot


Model # 374A

Internet # 100532582

Store SKU # 816403

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

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

This item has been discontinued.
The Home Depot no longer carries this specific product.

$24.78 / each


Model # 374A

Internet # 100532582

Store SKU # 816403

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.

  • 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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Assembled Depth (in.)  4 in  Assembled Height (in.)  2 in 
Assembled Width (in.)  2.5 in  Compatible Pipe Material  Brass 
Connection  FIP  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. 
Material  Cast Iron  Maximum Pressure (psi)  30 
Maximum Working Temperature (F)  180  Pipe or Fitting Product Type  Valve 
Product Height (in.)  3.5  Product Length (in.)  1.5 in 
Product Weight (lb.)  1.14 lb  Product Width (in.) 
Rating  Water  Returnable  90-Day 
Valve Inlet Diameter (in.)  .75  Valve Outlet Diameter (in.)  .75 


Rated 5 out of 5 by 3 reviewers.
Rated 5 out of 5 by Worked great My boiler relief valve was leaking and needed to be replaced due to corrosion. Home depot had one in stock and it was the exact one that was installed. July 8, 2014
Rated 5 out of 5 by Does the job Although a little pricey for just a pressure valve, it does do the job. September 1, 2013
Rated 5 out of 5 by Pressure relief valve The valve works and doesn't leak. I expected this. Reliability won't be determined in the immediate future. June 17, 2014
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