Model # 374A

Internet #100532582

Store SKU #816403

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

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

$24.78 /each

Frequently Bought Together

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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Name 3/4 in. Cast-Iron Water Pressure Safety Relief Valve 1/2 in. Brass FPT Feed-Pressure Regulator 3/4 in. Cast-Iron Hydronic 2-Way Flow Check Valve
Ratings (23) (17) (0)
Valve Inlet Diameter (in.) .75 .5 .75
Connection FIP FIP FIP x FIP
Valve Outlet Diameter (in.) .75 .5 .75
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Warranty / Certifications

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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
  • y_2017, m_4, d_24, h_1CST
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