RV Fresh Water Tank Fittings & Installation Guide | Elkhart RV Parts

A 1/2-inch NPT thread, a 1/2-inch hose barb and a grommet's pipe opening describe different connections. Match the tank connection, mating thread, hose size and installation method separately. We have not confirmed a universal kit, an approved fitting layout for your tank, or current availability of the historical custom spinweld service shown below.

The Uniseal Warehouse specifies white U075-W for 3/4-inch Schedule 40 PVC with a 1.050-inch outside diameter. Its product reference lists a 1.25-inch hole and a tank wall up to 3/8 inch thick. Those are specifications for that exact seal and pipe combination, not permission to drill your tank. The manufacturer's instructions use smooth pipe through the seal; a 1/2-inch NPT threaded fitting is not established as a substitute. Confirm the tank material, wall thickness, opening condition, clearances and tank manufacturer's approved installation before choosing a seal or making a hole.

See the exact U075-W supplier reference, Uniseal installation and sizing guidance and current U075-W listing. These references do not confirm a leak-free result or fit for your particular tank. For an existing leak, identify the installed seal and pipe, inspect their condition and have the tank and connection assessed before replacing parts. Do not pressure-test beyond the tank manufacturer's limits.

The historical service and CPI 83A references below are retained for identification. We have not recovered a current purchase target and exact application evidence for CPI 83A/500232, and the historical service listing is unpublished. Two original reference images are currently unavailable. Contact our team with the tank identification, opening and pipe measurements, photos and proposed fitting layout for review; no service, fitting package or installation outcome is confirmed by this answer.