'/%3E%3C/svg%3E)
Hover image to zoom
 --%3E %3Csvg version='1.1' id='Fill' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23F15C02' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Hover image to zoom
' fill='%23F15C02' d='M49 0C21.938 0 0 21.938 0 49s21.938 49 49 49 49-21.938 49-49S76.062 0 49 0m0 82.709a7.54 7.54 0 1 1 0-15.08 7.54 7.54 0 0 1 0 15.08m7.54-28.412a7.541 7.541 0 0 1-15.08 0V22.831a7.54 7.54 0 0 1 15.08 0v31.466z'/%3E%3C/svg%3E)
0274751 has been discontinued
Discontinued April 17, 2024
This product was discontinued by the manufacturer.
MANUALS (1)
Non-Potable Water Applications
–
This product does not comply with the “Safe Drinking Water Act,” which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking). This item is for non-potable (non-human consumption) water applications only.
Direct Replacement:
3/4" 174A Relief Valve w/ Flood Sensor Connectivity (125 psi)
Product Highlights
–
3/4"
125 psi
Bronze
Threaded Connection
Female Thread Type
250°F Max
Description
–
Note: This item does not comply with the 2014 Lead Free Act. It may not be used in potable water applications as of January 4, 2014. For potable water applications 0121479 is recommended.
Series 174A Boiler Pressure Relief Valves are used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 174A 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 shall not be used as an operating control. Standard Pressure Setting: 30psi (206.9 kPa), Pressure Range: In 5psi (34.5 kPa) increments from 30 to 150psi (2 to 10 bar) with corresponding high ratings from 650,000 to 14,370,000 BTU/hr.
Series 174A Boiler Pressure Relief Valves are used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 174A 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 shall not be used as an operating control. Standard Pressure Setting: 30psi (206.9 kPa), Pressure Range: In 5psi (34.5 kPa) increments from 30 to 150psi (2 to 10 bar) with corresponding high ratings from 650,000 to 14,370,000 BTU/hr.
Specs
–
| Pressure Set Point: | 125 psi |
|---|---|
| Application: | Heating |
| Capacity: | 2070000 BTU/hr |
| Size: | 3/4" |
| Material: | Bronze |
| Connection Type: | Threaded |
| Thread Type: | Female |
| Temperature Range (F): | 250°F Max |
| ASME: | Yes |
Questions?
Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm
Product Reviews
5 out of 5 reviews
100% would recommend this product
5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%
Showing 1-5 of 5 reviews
Super helpful tech
I was needing an older valve for the hot water system at my laundromat. I had the old part number but needed the new part number for the valve. It was recommended to me to look at Supply House so I quickly did an online search. I called them and the customer service person was able to give me the correct part number. The part was reasonably priced and they shipped to me right away, I had it in only a few days. I was very happy with my service!
DeeJay
St. Louis, MO
2 years ago
Verified Buyer
Was this review helpful to you?
Great product!
Application was great.
Mark
St. Louis
5 years ago
Verified Buyer
Was this review helpful to you?
i would definatly buy another one.
hot water storage tank pop off would not seal up after test. so I purchased a new one and it works great.
henry
Kamiah, Idaho
6 years ago
Verified Buyer
Was this review helpful to you?
I would like buy again.
Things is as per required.
jayantibhai Patel
Gallup ,NM
13 years ago
Verified Buyer
Was this review helpful to you?
Great watts product
Product worked as planned. No complaints.
Brett
Burlington, wi
15 years ago
Verified Buyer
Was this review helpful to you?
Product Q&A
1 Question1 Question
Q: why dose my say 30 LB
Asked by Al 13 years ago
Add your answer
Verified Reply- PexSupply StaffYou likely have a relief valve designed to release pressure at 30 psi. This is part 0274428 on our website.
Was this review helpful to you?
-
relief valves come in different pressures like 30 50 75 125 150 are the most you would see yours you said is 30 so if the water pressure gets over 30 psi the valve opens and lets water out to keep from any damage to the system. PUT ON SAME SIZE YOU THAKE OFF
Was this review helpful to you?