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3 in. ABS Backwater Valve
43901 - spec sheet
Features
- Fits easily on the end of ABS pipe
- Fits 3 in. ABS Schedule 40 pipe
- Entire valve assembly
- Hub by hub solvent weld connection
- Threaded access cap incorporates a neoprene seal for positive sealing and can be tightened or removed by hand
- Valve hub fits ABS pipe and can be adapted for sewer and drain pipe
- 3 in. ABS backwater valve
- Protects low areas or basements from backflow or waste from street sewers
- Elastomeric seal in quick action flapper ensures a water tight seal
43901 - spec sheet
Manufacturer Resources
Product Specs
- Volume:
- 0.236
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Fittings
- Product Type:
- Plastic Fittings
- Product Finish:
- Black
- Product Material:
- ABS
- Product Weight:
- 2
OATEY 43901 – Frequently Asked Questions
1) Will the Oatey 43901 backwater valve connect to 3 inch ABS Schedule 40 pipe?
Yes. The Oatey 43901 is sized for 3 inch ABS Schedule 40 pipe and uses a hub by hub solvent weld connection, so it slips onto the pipe ends and is cemented in place with ABS solvent cement. No threading or clamps involved.
2) Does a backwater valve actually stop sewage from backing up into a basement?
That is what it is for. The Oatey 43901 sits in the 3 inch drain line and its quick action flapper closes against an elastomeric seal when flow reverses, protecting basements and other low-lying fixtures from street sewer backflow. It stays open for normal outbound drainage.
3) Can the flapper on the Oatey 43901 be serviced without cutting the pipe?
Yes, and that is the reason to leave it accessible. The threaded access cap can be tightened or removed by hand, with a neoprene seal for a positive close, so the flapper can be inspected or cleared without tools and without disturbing the solvent welded joints. Keep the cap face reachable when you set the valve in a pit or chase.
4) Can a 3 inch backwater valve be installed on sewer and drain pipe instead of ABS DWV?
The valve hubs are made for ABS pipe, and Oatey states they can be adapted for sewer and drain pipe. Sewer and drain pipe runs a larger outside diameter than Schedule 40 at the same nominal size, so you will need the appropriate adapter at each hub rather than cementing S and D pipe straight into the valve.
5) Do I need to buy the flapper and body separately for the Oatey 43901?
No. The 43901 ships as an entire valve assembly, body, flapper and threaded access cap together. The only extras for the install are ABS solvent cement and any adapters needed if you are tying into sewer and drain pipe.
6) What material and color is the Oatey 3 inch backwater valve?
Black ABS throughout, which is why it solvent welds directly to ABS DWV pipe. Cementing ABS to PVC requires transition cement or a mechanical coupling, so match the valve to an ABS line where you can. Listed product weight is 2 pounds.
7) What is the exact part number for Oatey's 3 inch ABS backwater valve?
Oatey 43901. It is ordered as a single model with no size or finish options, so the part number alone specifies the 3 inch ABS hub by hub valve.
How fast can I get the OATEY 43901 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the OATEY 43901 come with a warranty?
Absolutely. The OATEY 43901 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the OATEY 43901?
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