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6 in. ABS Backwater Valve
43909 - spec sheet
Features
- Valve hub fits ABS pipe and can be adapted for sewer and drain pipe
- Fits 6 in. ABS Schedule 40 pipe
- Hub by hub solvent weld connection
- Threaded access cap incorporates a neoprene seal for positive sealing and can be tightened or removed by hand
- Entire valve assembly
- 6 in. ABS backwater valve
- Elastomeric seal in quick action flapper ensures a water tight seal
- Fits easily on the end of ABS pipe
- Protects low areas or basements from backflow or waste from street sewers
43909 - spec sheet
Manufacturer Resources
Product Specs
- Volume:
- 1.456
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Fittings
- Product Type:
- Plastic Fittings
- Product Finish:
- Black
- Product Material:
- ABS
- Product Weight:
- 11
OATEY 43909 – Frequently Asked Questions
1) What pipe does the Oatey 43909 backwater valve connect to?
It's built for 6 inch ABS Schedule 40 pipe, hub by hub, solvent welded on both ends. The hub can also be adapted for sewer and drain pipe. If your line is cast iron or PVC, you'll need an adapter or coupling at each hub to transition into ABS before the valve goes in.
2) What does a backwater valve like the Oatey 43909 actually do in a basement drain line?
It stops sewage from the street main pushing back up into low fixtures. The quick action flapper swings open for normal outbound flow and drops closed when flow reverses, so a surcharged municipal sewer backs up in the street instead of a basement floor drain or laundry sink. That's the reason it goes in a below-grade branch rather than the whole house line.
3) Can I service or clean the flapper on a 6 inch Oatey ABS backwater valve without cutting the pipe?
Yes. The valve has a threaded access cap you can tighten or remove by hand, so you get at the flapper for inspection and cleanout without breaking the solvent weld. Leave clear headroom above the valve for the cap to come off, and keep it accessible if it's going under a slab in a pit or box.
4) Does the Oatey 43909 seal well enough to hold against a surcharged sewer?
Two seals do the work: an elastomeric seal in the flapper for a watertight shutoff against reverse flow, and a neoprene seal on the threaded access cap so the cleanout opening doesn't weep under head pressure. Hand tightening the cap onto the neoprene is what's specified, no wrench needed.
5) Is the Oatey 43909 a complete valve or do I need to buy the body and internals separately?
It ships as the entire valve assembly, body and flapper together. What you supply on the job is solvent cement and ABS primer if your jurisdiction requires it, plus any transition couplings if the existing line isn't 6 inch ABS.
6) How heavy is the Oatey 6 inch ABS backwater valve for a one-man install?
Listed weight is 11 pounds, so it's a one-person set even in a trench, but it's enough mass that you want the pipe supported on both sides of the hub rather than hanging the valve off a single joint.
7) What part number do I order for Oatey's 6 inch ABS backwater valve?
Oatey 43909 is the manufacturer part number for the 6 inch ABS hub by hub backwater valve. There's one configuration, so size and connection type are fixed at 6 inch solvent weld.
How fast can I get the OATEY 43909 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
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 43909 come with a warranty?
Absolutely. The OATEY 43909 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 43909?
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installation tips, and troubleshooting. Contact Us
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