Wilkins 375 RPZ Backflow Preventer 1 in. FPT | WK375-100

• Max Working Pressure: 175 PSI
• Temperature Range: 32F to 180F
• Fits: 1 in.

Features & Benefits

Designed for installation on potable water lines to protect against both back-siphonage and backpressure of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists.

ZURN WILKINS Model 375 Reduced Pressure Principle Backflow Preventers are for use on water lines where a health hazard could exist if a backflow situation were to occur.

Product Details

• Test Cocks: 4 FEMALE
• Max Working Pressure: 175 PSI
• Hydrostatic Test Pressure: 350 PSI
• Temperature Range: 32F to 180F
• Main Valve Body Materials: Reinforced Nylon
• Relief Valve Body: Bronze
• Elastomers: Silicone
• Springs: Stainless Steel
• Warranty: 1 Year
• Size: 1 in.
• Connection: FPT
• Not Lead-Free

1. Before installing a Model 375 Backflow Preventer, flush the line thoroughly to remove all debris, chips and other foreign matter. If required, a strainer should be placed upstream of the Backflow Preventer. CAUTION: Do not use a strainer in seldom used emergency waterlines such as fire lines.
2. Provide adequate space around the installed unit so that the test cocks will be accessible for testing and servicing.
3. WARNING: If installation of a Model 375 is in a building, a suitable drain arrangement MUST
   be provided to drain off spillage from the relief valve. An air gap at least two times the pipe diameter must be provided between the relief valve and the drain piping to prevent a cross-connection. Air Gap AG-11 not intended to support weight of drain pipe. CAUTION: Do not pipe the relief valve solidly to a floor drain, sewer or sump.An adequately sized drain is required to prevent possible water damage due to relief valve discharge.
4. Install valve at least 12 inches above surrounding flood level.
5. Always consult local codes for installation methods, approvals and guidance.

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