The Watts LFU5B-GG-LP Z3 1/2 is a 1/2" lead-free pressure reducing valve with single union NPT connections. It reduces inlet pressure of up to 300 psi to an adjustable 10-35 psi downstream, factory set at 30 psi. It features a copper body and a epdm seat. Rated to 300 psi and 33°F to 180°F. This model is certified lead-free for potable-water installations.
This 1/2 inch lead free high performance water pressure reducing valve is equipped for low pressure ranges with gauge tapping and a 160 psi (11.0 bar) gauge. It is designed to reduce incoming water pressure to protect plumbing systems and reduce water consumption for commercial, industrial and residential applications. The easy maintenance assembly consists of a replaceable seat module and a bypass feature to control thermal expansion pressure. The temperature range is 33 to 160 degrees F (0.5 to 71 degrees C). The low pressure range is 10 to 35 psi (69 to 241 kPa) with the standard setting at 50 psi (345 kPa).
Features
- Sealed spring cage with stainless steel cage screws
- High temperature resistant reinforced diaphragm for hot water
- Bypass feature controls thermal expansion pressure
- NPT threaded female union inlet by NPT female outlet
- Includes: Bypass
Common Questions
- Does it have a built-in bypass for thermal expansion, or do I still need an expansion tank?
- LFU5B-GG-LP Z3 1/2 includes an integral thermal-expansion bypass. When downstream pressure from a water heater rises above the inlet pressure, the bypass relieves that excess back through the valve toward the supply, which prevents nuisance pressure build-up on a closed system. It is not a substitute for a properly sized thermal expansion tank where your local code requires one - the bypass only relieves back to the street when street pressure is lower, so check the code in your jurisdiction.
- What pressure is it set to out of the box?
- LFU5B-GG-LP Z3 1/2 ships factory set at 30 psi. The adjustable reduced-pressure range is 10 to 35 psi, so you can dial the outlet anywhere in that band on site with the adjusting screw - loosen the locknut, turn in to raise pressure and out to lower it, then retighten and verify with a gauge.
- Does it include a strainer?
- No - LFU5B-GG-LP Z3 1/2 does not have an integral strainer. On dirty or older supply lines, install a separate inline strainer upstream to keep debris off the seat.
- Does it come with a gauge?
- Yes - LFU5B-GG-LP Z3 1/2 is supplied with a gauge tapping and a pressure gauge already fitted, so you can read and set the reduced downstream pressure without adding a tee.
Specifications
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Type: Pressure Regulator
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Size: 1/2"
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Inlet Size: 1/2"
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Outlet Size: 1/2"
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Connection: NPT
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Body Material: Copper
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Seat / Seal Material: EPDM
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Max Pressure (psi): 300
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Shutoff: None
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Pack Quantity: 6
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Country of Origin: United States
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Warranty: 1 Year Limited
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MPN: LFU5B-GG-LP Z3 1/2
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Temperature: 33°F to 180°F
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Certifications: ASSE-1003, ANSI-A112.26.2, IAPMO
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Lead-Free: Yes
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Factory Set Pressure (psi): 30
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Adjustable Range - Min (psi): 10
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Adjustable Range - Max (psi): 35
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Thermal Expansion Bypass: Yes
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Integral Strainer: No
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Gauge: Gauge Tap + Gauge
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Union Configuration: Single Union
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Capacity Class: High Performance
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Regulated Media: Water
