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LF111-125 Watts Pressure Relief Valve 125 Psi. Lead Free
   Model: LF111-125
LF111-125 Watts Pressure Relief Valve 125 Psi. Lead Free
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Base Price:  $22.15
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    watts pressure relief valve lead free LF 111-125
    Watts Pressure Relief Valve Model LF111-125

    Lead Free
    1/2"
    125 PSI MPT
    Auxiliary (bleeder) pressure relief valve is set approximately 25psi (172 kPa) lower than heater T&P valve and eliminates unnecessary and frequent relief from hot water heater T&P relief valve. This protects the system from thermal expansion pressure buildup during times when reducing valve thermal expansion bypass is ineffective due to high inlet water pressure. 

    Some national and regional codes require maximum static (no-flow) pressure at any fixture to be not more than 80psi (5.5 bar).Standard setting is 125psi (6.9 bar), maximum temperature 180°F (82°C).

    download pdf Installation Instructions

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    A typical solar domestic water heating system components and layout is shown below.


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