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Thetford 31705 Aqua-Magic V Water Module Assembly Kit (High & Low Profile, Includes Closet Flange Seal) Engineering Diagram
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SPECFOUNDRY SKU: SF-RV-111 · BRAND REF: Thetford

Thetford 31705 Aqua-Magic V Water Module Assembly Kit (High & Low Profile, Includes Closet Flange Seal)

Stamped Casting / OEM Numbers: 31705 028985317050

Compatible Units: Thetford Aqua-Magic V permanent RV toilets, high and low profile, hand-flush and foot-pedal versions (Thetford instruction sheet also lists Aqua-Magic VI)

Critical Dimensions & Spec: Kit contents per Thetford sheet 31715C: K1 water module (locking tab, link hole, retaining screw, hand-spray barb), K2 water module link, K3 closet flange seal; boxed size approx. 6.7" x 5.5" x 3.5", 6.4 oz

$79.99
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Pre-Order Dimensional Verification Checklist

OEM Cross-Reference & Stamped Casting Number Table

Use this cross-reference table to confirm that the number stamped or printed on your original hardware or circuit board corresponds to SpecFoundry SKU SF-RV-111:

Stamped / OEM Part Number Manufacturer / System Brand Compatible Models & Years SpecFoundry Replacement SKU
31705ThetfordThetford Aqua-Magic V permanent RV toilets, high and low profile, hand-flush and foot-pedal versions (Thetford instruction sheet also lists Aqua-Magic VI)Direct Match (SF-RV-111)
028985317050ThetfordThetford Aqua-Magic V permanent RV toilets, high and low profile, hand-flush and foot-pedal versions (Thetford instruction sheet also lists Aqua-Magic VI)Direct Match (SF-RV-111)

Common Failure Symptoms Solved by SF-RV-111

Technicians and property owners typically replace 31705 when experiencing one or more of the following failure modes:

  • Fresh water keeps trickling into the bowl after the pedal is released
  • Water sprays or drips from the back of the toilet at the supply-line connection when the 12V pump runs
  • Cracked plastic water module housing after a freeze, leaking onto the floor behind the toilet

Step-by-Step Dimensional Verification & Installation Notes

Turn off the water pump and open a faucet to drop pressure. Per Thetford's sheet: remove the retaining screw behind the module, unscrew the water supply line with a 1/2" wrench, lift the locking tab and pull the link out of the module, then tilt the module to free the link from the pedal lever arm. Install in reverse. If your toilet has the optional hand sprayer, cut the bottom off the new module's hand-spray barb between the two ribs before reattaching the hose.

Frequently Asked Technical Questions (31705)

Where is the casting or OEM part number (31705 / 028985317050) stamped on this part?

Thetford does not mold 31705 into the old module. The number is on the kit package and on Thetford instruction sheet 31715C. Identify your toilet instead: it must be an Aqua-Magic V (high or low profile). The kit includes the module, the link, and a new closet flange seal.

Does SpecFoundry SKU SF-RV-111 directly replace OEM part 31705 (31705, 028985317050)?

Check the part number and model before ordering. SF-RV-111 is sold as Thetford 31705, 028985317050 for Thetford Aqua-Magic V permanent RV toilets, high and low profile, hand-flush and foot-pedal versions (Thetford instruction sheet also lists Aqua-Magic VI). If you are unsure, email us a photo of the old part and the appliance or window label before you order.

What measurements should I verify before ordering SF-RV-111?

Before ordering, verify: (1) Stamped or OEM code matches one of 31705, 028985317050; (2) Dimensional spec matches: Kit contents per Thetford sheet 31715C: K1 water module (locking tab, link hole, retaining screw, hand-spray barb), K2 water module link, K3 closet flange seal; boxed size approx. 6.7" x 5.5" x 3.5", 6.4 oz; and (3) Application matches: Thetford Aqua-Magic V permanent RV toilets, high and low profile, hand-flush and foot-pedal versions (Thetford instruction sheet also lists Aqua-Magic VI).

How fast does SF-RV-111 ship and what payment methods are accepted?

SF-RV-111 ships within 1–2 business days from our US warehouse network. Flat-rate US Ground shipping is $8.95, or FREE on orders of $150+. You can check out online immediately via PayPal, Venmo, Credit/Debit Card, or request an Instant Card Payment Link / Net-30 Commercial PO Invoice.

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