Dupree Twis-Loc Valve (Manual) - Complete
SKU: 84496345466

Dupree Twis-Loc Valve (Manual) - Complete

Sale price$80.99 Regular price$89.99
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Description

Dupree Twis-Loc Valve (Manual) - CompleteThe only RV waste valve designed to be installed once and serviced indefinitely. Built in North America since 1964. A waste valve built to outlast your RV Most RV waste valves are designed to fail. Thin plastic bodies, non replaceable seals, blades that gunk up, handles that snap off. The standard issue blade gate valve installed on virtually every RV on the road is built to an OEM price point of just a few dollars per unit, and every cost down

The only RV waste valve designed to be installed once and serviced indefinitely. Built in North America since 1964.

A waste valve built to outlast your RV

Most RV waste valves are designed to fail. Thin plastic bodies, non-replaceable seals, blades that gunk up, handles that snap off. The standard-issue blade gate valve installed on virtually every RV on the road is built to an OEM price point of just a few dollars per unit, and every cost-down decision ends up in the part of your plumbing system handling the most aggressive flow.

The Dupree Twis-Loc is the opposite of that. Heavy-duty ABS body. Positive-lock handle. Fully serviceable internals. The same valve has been in continuous production since 1964 — and we have units from that decade still operating in their original installations.

What makes it different

Heavy-duty ABS body. Significantly thicker than the typical RV gate valve. Designed for the structural loads of slip-joint flex, road vibration, and freeze-thaw cycles that crack thin-wall valves.

Positive-lock handle. A half-turn opens or closes the valve, and the handle locks into the closed position. No slipping under road vibration. No accidental bumps opening the valve while you connect your sewer hose. When the Twis-Loc is closed, it stays closed.

Two-screw serviceable internals. When a seal eventually wears, two screws and a replacement kit restore the valve to factory condition in a couple of minutes. You don't replace the whole valve. You don't disturb the slip-joint gaskets. You service the valve and put it back to work.

60+ years of field validation. Specified by SilverStreak travel trailers and Blue Bird Wanderlodge motor coaches at the height of their premium reputations, and chosen today by high-end motor coach manufacturers. The valve in use on a coach built in 1968 is the same design — refined but architecturally identical — that ships out of our facility this week.

Built in North America. Valve bodies precision-molded in Canada. Final assembly at our facility in the United States. Same manufacturing footprint since 1964. Email us with a question and the response comes from the people who actually make the valve — not a customer service queue.

Fit and installation

The Twis-Loc installs as a permanent part of your waste plumbing system. The 3-inch standard size fits any motorhome, fifth wheel, travel trailer, toy hauler, or motor coach — but the install is more involved than a bolt-on valve swap. It's best suited for new builds, major renovations, or professional retrofits.

When you're done replacing valves

The case for the Twis-Loc is simple. It's a valve you install once and maintain indefinitely. The serviceable design means you're buying into a product, not a consumable. The 60-year track record means you're not the experiment. The North American manufacturing means the people who make the valve are the same people who answer your email.

If your valve has failed or is failing, this is the upgrade that ends the cycle.


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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 84496345466

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JR Landreau
Natrona Heights, US
★★★★★ 5
Engine abd
Good quality, sturdy, and easy to install.
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Reviewed in the United States on September 7, 2025
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Verified Purchase
K. Anderson
Chelsea, US
★★★★★ 4
Working great
Both filters fit just right and are doing a great job.
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Reviewed in the United States on October 9, 2025
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The Southwest Grasshopper
Dallas, US
★★★★★ 5
Good replacement parts and affordable
I acquired this filter set to replace the OEM filters in my wife's Honda Accord. The filters fit perfect and were easy to install. Normally when I replace filters I have to purchase both the air filter and the cabin filter separately. In this case, it was very nice to have them sold as a combo set. While I don't know what materials are used to manufacture these filters, I will say that the air filter looks just like the OEM part in terms of it's production. The cabin filter does have carbon built in to help control orders, which is something the OEM part did  not have, so it looks different in terms of filter color. I normally replace filters every 10K to 15K miles, and this fits in line with that this manufacturer suggests (every 12K miles).  In all, a decent combo set of filters helps keep costs down and both filters can be replaced at the same time. 
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Reviewed in the United States on July 6, 2025
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K Alex
Houston, US
★★★★★ 5
Perfect!!!
This is exactly what I needed. Fits perfectly for my 2018 Honda Accord as well as being very easy to install. This is coming from someone who has no idea about doing anything on my car. Provides the best function, just as it would coming from a dealer or other auto shop. The quality is great as well, and this is exceptional value for the money. If you are looking to save money and not get bombarded with the filter replacement question when getting an oil change then this is the one for you.
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Reviewed in the United States on August 4, 2025
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T. Isaacson
Lowell, US
★★★★★ 5
Fit is good.
Filters fit and look essentially the same as the filters I’ve purchased and the official types from the dealer. I live in an area where wildfires occur almost every year,  so it’s good to have an extra set of filters to change them out after a run of smoky days. 
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Reviewed in the United States on July 1, 2025

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