Thetford Aqua-Magic V water module assembly — 31705 direct-fit valve kit with mounting hardware

Thetford 31705 Aqua-Magic V Toilet water module assembly is a direct replacement valve kit engineered to restore reliable flush performance on Aqua-Magic V high- and low-profile RV toilets.

Thetford’s 31705 water module assembly replaces the internal valve and includes the necessary mounting hardware and instructions to make installation straightforward. Designed specifically for Aqua-Magic V models, this kit addresses common leak or flush issues caused by worn or damaged valve components, helping your RV or marine toilet return to proper operation without needing a full bowl replacement.

How will this valve kit fix my Aqua-Magic V toilet?

Worn seals and valves are typical causes of slow or weak flushes, persistent leaks, or water flow problems. The 31705 kit supplies a new water valve assembly built to match factory specifications so the toilet can once again control water flow correctly. Replacing only the valve is often faster and far less expensive than replacing the entire toilet.

• Direct-fit valve designed for Aqua-Magic V high- and low-profile models
• Includes mounting hardware to replace the old assembly
• Factory-compatible dimensions to preserve original water routing
• Supplied instructions for step-by-step installation guidance

What parts are included and what tools will I need?

The kit contains the replacement water valve module plus the fasteners required for installation and a printed instruction sheet. Basic hand tools and a little mechanical comfort are usually enough to complete the swap in a short time. If you prefer, a service technician or RV shop can perform the replacement for you.

• Replacement valve module and mounting hardware included in the kit
• Common tools: screwdriver set, adjustable wrench, and pliers
• Recommended: towel, bucket, and safety gloves for a clean, dry workspace
• Optional: silicone grease for seals if reassembly requires lubrication

How long does installation take and are instructions provided?

Installation time varies with experience but typically takes 30–90 minutes for a homeowner comfortable with basic plumbing tasks. The package contains instructions from Thetford to guide you through removal of the old valve and fitting of the new module. Following the manual and turning water off before starting will make the process quicker and safer.

• Average home-install time: under 90 minutes for most users
• Manufacturer-supplied instructions included in the kit
• Tip: shut off fresh water supply and empty the bowl before starting
• Test the unit after reassembly for leaks and proper flush action

Who is this for: Thetford’s 31705 Aqua-Magic V water module assembly is intended for RV owners, boaters, and maintenance professionals who need a reliable, OEM-compatible repair for Aqua-Magic V toilets. It suits anyone who prefers repairing specific components rather than replacing the entire toilet, and it’s ideal for fleet managers or DIYers looking to extend service intervals and avoid downtime. If your Aqua-Magic V toilet is showing slow flushes, leaking around the valve area, or inconsistent water flow, this kit provides the exact replacement parts and guidance to restore proper operation while maintaining factory fit and function.