The Watts RK 757/757DCDA-CK2 21/2-4 is a genuine second check kit for 2 1/2" to 4" 757 / 757DCDA double check valve assemblies. It features a silicone seat.
This second check repair kit provides all the parts necessary to repair or replace the second check on a 2 1/2 to 4 inch double check valve assembly backflow preventer, model 757, and double check detector assembly backflow preventer, model 757DCDA. This kit consist of a first check module, check module O-ring, and red silicone disc elastomer.
Features
- Factory replacement kit
- No special tools required for servicing
- All parts are made of high quality materials
- Serviceable in the field
Common Questions
- Will this kit fit my valve?
- The RK 757/757DCDA-CK2 21/2-4 fits 2 1/2", 3" and 4" sizes of Watts series 757 / 757DCDA. Kits are size- and series-specific, so match the model stamped on your valve body or cover before ordering.
- What's included in this kit?
- This is a second check kit. Kit consists of: a first check module, check module O-ring, and red silicone disc elastomer.
- Are these genuine Watts parts?
- Yes. This is the factory RK 757/757DCDA-CK2 21/2-4 kit built with genuine Watts OEM components. Aftermarket parts can void your assembly approval and are commonly rejected by inspectors at annual test time.
- Which kit do I need if my relief valve failed the test?
- Not this one — this kit services the check valve. A failed relief valve needs the RV (rubber parts) or VT (total relief valve) kit for 757 / 757DCDA in your size; a total repair (T) kit covers the relief valve and both checks.
Specifications
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Type: Double Check
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Seat / Seal Material: Silicone
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Country of Origin: United States
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Warranty: 1 Year Limited
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MPN: RK 757/757DCDA-CK2 21/2-4
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Lead-Free: No
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Product Role: repair_kit
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Kit Type: Second Check Kit
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Fits Brand: Watts
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Fits Valve Series: 757;757DCDA
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Fits Valve Size: 2 1/2";3";4"
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Used With: 2 1/2" 757;2 1/2" 757DCDA;3" 757;3" 757DCDA;4" 757;4" 757DCDA
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Kit Contents: Kit consists of: a first check module, check module O-ring, and red silicone disc elastomer.
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Genuine OEM Parts: Yes
