Description
Product Overview
The 31705 Toilet Water Valve Kit from AMI PARTS is engineered for RV and marine toilets that require a reliable, high‑flow flushing solution. Constructed from a blend of metal, plastic, and rubber, the valve body is painted for corrosion resistance and a clean appearance. It features 1.5‑inch flange inlet and FNPT outlet connections, dual ports for flexible plumbing, and a compact size of 5.98 x 4.25 x 4.17 inches. The kit includes the valve, a toilet flange seal, and small screws, all packaged in a lightweight 8.8‑ounce box.
Usage
Designed for both high‑height and low‑height RV toilets, this valve excels in mobile environments where space is limited and reliability is critical. Install it in recreational vehicles, camper vans, boat heads, or any portable sanitation system that uses a 1.5‑inch water supply. The dual‑port design allows you to connect both the water inlet and a vent line, ensuring smooth operation even when the vehicle is on the move. Ideal for DIY enthusiasts and professional service technicians alike, the kit requires only basic hand tools and a few minutes of work.

Why Choose Us
AMI PARTS commits to premium material upgrades, featuring thicker walls and tighter tolerances than standard aftermarket valves. Each unit undergoes rigorous testing to meet automotive and marine standards, delivering a leak‑free seal and consistent flow rate. Our after‑sales support includes detailed installation guides and responsive customer service, ensuring you can rely on the valve for years of trouble‑free use.
Key Features
- Durable metal construction with painted finish for corrosion resistance.
- Dual 1.5″ ports (flange inlet, FNPT outlet) for versatile plumbing configurations.
- Complete installation kit includes valve, flange seal, and screws.
- Compatible with high‑ and low‑height RV toilets and marine heads.
- Easy DIY installation in 20‑60 minutes with basic tools.
FAQ
What toilet models are compatible with the 31705 valve?
The 31705 valve replaces a wide range of OEM parts, including models 31646, 31647, 31650, 31651, 31657, 31658, 31661, 31662, 31667, 31668, 31671, 31672, 31675, 31676, 31679, 31680, 31833‑31840 and many others commonly found in RV and marine applications.
Do I need any special tools to install this valve?
No special tools are required. A standard set of screwdrivers, a wrench for the 1.5‑inch connections, and basic hand tools are sufficient. The included screws and seal simplify the process.
How do I know if my toilet needs this replacement?
Typical symptoms include reduced flush power, water leakage at the valve base, or a constant trickle after flushing. Age‑related seal drying or limescale buildup also indicate a replacement is needed.
Is the valve suitable for cold water only?
The valve is rated for standard RV water systems, which are typically cold water. It can handle typical pressure ranges up to 80 psi without issue.
What warranty does AMI PARTS provide?
AMI PARTS offers a one‑year limited warranty covering manufacturing defects. Contact our support team with your purchase details for assistance.








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