LaSalle Bristol 39241 1-1/2" Waste Valve Kit
Updated June 18, 2026
The LaSalle Bristol 39241 is a 1.5-inch (1-1/2") waste valve kit designed for recreational vehicles (RVs), travel trailers, and campers. This gate-style valve controls the discharge of black water (toilet waste) and gray water (sink/shower) from holding tanks to the sewer connection. Manufactured by LaSalle Bristol, a major supplier of RV plumbing components, the kit includes the valve body, seals, and all necessary mounting hardware for a direct replacement of worn or leaking original equipment valves.
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Design and Construction
The 39241 valve features a durable ABS plastic body with a gray pull handle that slides to open or close the waste flow. The 1-1/2" opening matches standard RV waste plumbing connections, allowing unrestricted drainage when the valve is open. The kit includes a round gasket and four mounting bolts with nuts to secure the valve between the toilet flange and holding tank or between tank outlets and drain pipes. It is designed to fit Bristol/Anonda valve patterns, making it a common service part for many RVs.
Compatibility and Applications
This valve is intended for use in RV and trailer waste systems that use 1-1/2" pipe connections. It is commonly installed as the termination valve at the holding tank outlet or as the toilet-to-tank valve. The kit is compatible with Bristol and Anonda valve brands and is often used as a direct replacement for original equipment on many travel trailers, fifth wheels, and motorhomes. It is not designed for permanent residential plumbing or pressurized systems.
Common Failure Symptoms and Diagnosis
Over time, waste valves can fail due to dried-out seals, debris buildup, or broken handles. Symptoms include leaks around the valve body, difficulty pulling the handle, or the valve not fully closing, leading to odors or slow drainage. To diagnose, inspect for cracks in the ABS housing, check that the handle moves smoothly, and look for water seepage at the mounting flanges. A stuck or leaking valve should be replaced promptly to prevent unsanitary conditions and tank damage.
Installation Notes
Replacing the 39241 valve is a straightforward DIY task. First, ensure the holding tanks are empty and the system is clean. Remove the old valve by unscrewing the mounting bolts and separating the flanges. Clean the mating surfaces and install the new gasket. Position the new valve with the handle oriented for easy access, then tighten the bolts evenly. Do not overtighten, as ABS can crack. Test for leaks by filling the tank with water and operating the valve several times. The kit does not include a cap; a separate sewer cap or bayonet fitting may be needed for the outlet.
