42 Gallon Fresh Water RV Tank 731BLANK with Fittings & Sensors

Asked by ScottAsked on June 13, 2025Answered by Elkhart RV Parts

Customer Question

Can you assist with preparing and installing a 42-gallon fresh water tank (SKU 731BLANK) measuring 60"x24"x9" that has a 1" hose barb fill fitting, two 1/2" FPT fittings (vent and pump), a 1/2" drain MPT fitting, and four tank level sensors? I need 1 1/4" and 1/2" spin weld fittings and four level sensors for replacement installation.

Expert Answer

The tank identity and connection plan need to be confirmed before selecting fittings or sensors. The dimensions in your question, the current 731BLANK catalog title and the drawing shown below are not identical. The retained Alpha drawing is labeled 731002, dated January 5, 2018, and shows 60 by 24 by 8-inch reference dimensions with a ±1/4-inch tolerance. It does not establish that the requested 60 by 24 by 9-inch installation has the same clearance or fitting layout.

The current 731BLANK listing is a tank reference, not an approved plumbing plan. Neither its SKU nor the pictured outline confirms that fill, vent, pump, drain fittings or four sensors are included or installed. The exact 731002-to-731BLANK drawing/configuration cross-reference and the requested fitting/sensor applications have not been independently confirmed here.

Provide the original tank markings, available mounting space and a dimensioned connection sketch showing each fill, vent, pump, drain and sensor location. Record hose-barb versus male/female pipe-thread connections separately. A nominal hose or pipe size alone does not approve a spin-weld fitting, hole size, tank material/process or sensor interface. Have an RV plumbing or tank-installation professional confirm the exact components and installation method before drilling or welding. No Universal Fittings Kit, fitting quantity, sensor compatibility, preparation service, stock or installation outcome is promised by this answer.

Drawing note: The original image below is retained for identification and dimensional comparison. It is not a fitting-placement template or approval to modify the tank.