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End of Pipe Gripper Plug 4 IN. GRIPPER
Features
- End-of-pipe seals only at the end of a pipe, preventing plug from falling into stack
- Plug is rated for 17 PSI or 40-ft of head pressure
- Natural rubber O-ring for excellent expansion and memory
- Galvanized carriage bolt to prevent corrosion
- Extra large zinc wing nut for ease of tightening, no wrench required,and will not rust
- End of Pipe Gripper plugs are made with ABS glass-reinforced plates for added strength
Manufacturer Resources
Product Specs
- Volume:
- 0.014
- Department:
- Plumbing
- Product Group:
- Plumbing Testing
- Product Subgroup:
- Testing Products
- Product Type:
- Test Plug
- Product Weight:
- 0.5
OATEY 33403 – Frequently Asked Questions
1) How much pressure will the Oatey 33403 gripper plug hold during a DWV test?
The 33403 end-of-pipe gripper plug is rated for 17 PSI, or 40 feet of head pressure. That covers a standard water column test on a stack up to about four stories of head. Don't push it past that rating with air or water.
2) Will the Oatey 33403 plug fall into the stack if it lets go?
No, and that's the point of the end-of-pipe design. The 33403 seals only at the end of the pipe rather than inside it, so the plate stays outside the opening and the plug can't drop down into the stack the way an internal expansion plug can. That makes it the one to reach for on an open riser or a cleanout where retrieval would mean cutting pipe.
3) What size pipe does the Oatey 33403 gripper plug fit?
The 33403 is the 4 inch gripper plug, sized for 4 inch DWV pipe. It seals on the end of the pipe, so it goes on the open end of a 4 inch stack, riser, or cleanout, not inside a fitting hub.
4) Do I need a wrench to tighten an Oatey gripper test plug?
No tools needed. The 33403 uses an extra large zinc wing nut you turn by hand to draw the plate down and expand the O-ring. The wing nut won't rust, and the carriage bolt under it is galvanized, so a plug that sits in a wet stack or gets reused across jobs still backs off cleanly next time.
5) What seals the Oatey 33403 against the pipe, and will it hold up to being reused?
A natural rubber O-ring does the sealing, chosen for expansion and memory, which is what lets it recover its shape between uses instead of taking a permanent set. The clamping plates are ABS with glass reinforcement for strength, so the hardware behind the seal isn't the weak point when you crank the wing nut down.
6) Should I use an end-of-pipe plug or an internal test plug on a 4 inch stack?
Pick based on where you need the seal and what happens if it slips. The Oatey 33403 is an end-of-pipe type: it grips at the open end, so the seal is visible and the plug stays retrievable. An internal expansion plug seats down inside the pipe, which is what you want when the pipe end will be inside a fitting or you need the plug below the rim, but it can drop into the stack if it releases. On an open riser or a test tee where you'd never get it back, the end-of-pipe plug is the safer call.
7) What is the part number for the Oatey 4 inch end of pipe gripper plug?
Order it as Oatey 33403. That's the manufacturer part number for the 4 inch end-of-pipe gripper plug, rated 17 PSI. Oatey builds the same gripper style in other pipe sizes, so quote the 33403 specifically when you need the 4 inch.
How fast can I get the OATEY 33403 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 33403 come with a warranty?
Absolutely. The OATEY 33403 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 33403?
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