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Pressure Valves

Pressure valves in this category include pressure relief valves, boiler feed valves and pressure reducing valves from Taco, Zurn, Honeywell and Matco-Norca.

21 products
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Product Description Part# / Brand Qty Unit Price
1/2" Pressure Reducing Valve 15-75 psi (Lead-Free)
Ships within 1.5 - 2 weeks
12-NR3XL
Zurn
x1
$61.95 / each
3/4" Pressure Reducing Valve 15-75 psi (Lead-Free)
In Stock
34-NR3XL
Zurn
x1
$57.95 / each
1" Pressure Reducing Valve 15-75 psi (Lead-Free)
In Stock
1-NR3XL
Zurn
x1
$71.95 / each
1-1/4" Pressure Reducing Valve 15-75 psi (Lead-Free)
Ships within 1.5 - 2 weeks
114-NR3XL
Zurn
x1
$179.95 / each
1-1/2" Pressure Reducing Valve 15-75 psi (Lead-Free)
Free shipping
Ships within 1.5 - 2 weeks
112-NR3XL
Zurn
x1
$297.95 / each
2" Pressure Reducing Valve 15-75 psi (Lead-Free)
Free shipping
Ships within 1.5 - 2 weeks
2-NR3XL
Zurn
x1
$359.95 / each
1/2" Adjustable Pressure Relief Valve 25-175 psi (Lead-Free)
Temporarily Out of Stock
12-P1500XL
Zurn
x1
$22.95 / each
3/4" Adjustable Pressure Relief Valve 25-175 psi (Lead-Free)
In Stock
34-P1500XL
Zurn
x1
$22.95 / each
1/2" Adjustable Pressure Relief Valve 75-125 psi (Lead-Free)
In Stock
12-P1550XL-125
Zurn
x1
$6.25 / each
3/4" Adjustable Pressure Relief Valve 75-125 psi (Lead-Free)
Temporarily Out of Stock
34-P1550XL-125
Zurn
x1
$6.25 / each
3/4" Pressure Relief Valve 30 psi (Lead-Free)
Temporarily Out of Stock
P1000AXL-30C
Zurn
x1
$11.50 / each
3/4" Pressure Relief Valve 125 psi (Lead-Free)
In Stock
P1000AXL-125C
Zurn
x1
$11.50 / each
3/4" Pressure Relief Valve 150 psi (Lead-Free)
In Stock
P1000AXL-150C
Zurn
x1
$11.50 / each
3/4" Temperature & Pressure Relief Valve w/ 4" probe
In Stock
TP1100A-4C-150C
Zurn
Not Lead Free
x1
$10.95 / each
3/4" Temperature & Pressure Relief Valve w/ 8" probe
Temporarily Out of Stock
TP1100A-8C-150C
Zurn
Not Lead Free
x1
$10.25 / each
3/4" NPT x Union Pressure Differential Bypass Valve
In Stock
3196
Taco
x1
$52.95 / each
1/2" Threaded x Union Pressure Reducing/Boiler Fill Valve
In Stock
329-T3
Taco
x1
$42.50 / each
1/2" Threaded x Union Pressure Reducing/Boiler Fill Valve & Pressure Relief Valve
In Stock
334-T3
Taco
x1
$61.95 / each
1/2" Threaded Pressure Reducing Valve, Cartridge Style, 10-50 psi
In Stock
3350-T3
Taco
x1
$49.95 / each
1/2" FNPT or Sweat x Union Pressure Reducing/Boiler Fill Valve
In Stock
FM450
Honeywell
x1
$44.95 / each
1/2" FNPT or Sweat x Union Boiler Fill Valve w/ Backflow Assembly
In Stock
FM911
Honeywell
x1
$69.95 / each
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Pressure Valve Types and Applications

Pressure Relief Valves

To protect the system components from excessive pressure created by expansion of hot water, a pressure relief valve is used. A typical hot water heating or plumbing system requires a diaphragm type expansion tank, which accommodates the expanded hot water. When hot water volume exceeds the tanks’ capacity and the pressure created by hot water exceeds the threshold pre-set value of the pressure relief valve, it opens, releasing the excess water.

Pressure Reducing Valves

Most of the pressure reducing valves sold at PexUniverse.com are adjustable. They feature a knob or other mechanism which allows to regulate the flow-through water pressure. This feature allows to adapt an external water supply to the pressure specifics of the heating system.

Boiler Feed Valves

A typical hydronic heating system has an external water supply, which automatically refills the system when its’ pressure drops below the settings of the boiler feed valve. Since the external water supply pressure (i.e. domestic water pressure) almost always exceeds that of the hydronic system, boiler feed valve acts as a pressure reducing valve. The valve is often coupled with a pressure relief valve which performs the functions described above.

Pressure Bypass Valves

In a heating system with zone valves or actuator valves (such as on a radiant heating manifold), the valves have a slower reaction time then that of the circulator pump. When the circulator starts and the valves are not fully open, the pump generates excess pressure inside the system, shortening the lifetime of itself and other system components. A pressure bypass valve, such as Taco 3196 series, helps to bypass the excessive pressure until the zone valve(s) fully open.

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