Verified Compatibility

Thetford 42049

Water Valve

Thetford 42049 is the water valve for the Aqua-Magic Style II and Aqua-Magic Residence. The valve that lets fresh water into the bowl when the pedal is pressed. Thetford lists it for both the Aqua-Magic Style II and the Aqua-Magic Residence.

Is it compatible?

Compatible with

  • Aqua-Magic Style II
  • Aqua-Magic Residence

Every model above is named in a manufacturer parts list, cited in full further down this page.

Current eBay listings for Thetford 42049

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Compatible models, and the document that says so

  • Aqua-Magic Style II

    Verified against Thetford Parts List, Aqua-Magic Style II (Rev D).

  • Aqua-Magic Residence

    Verified against Thetford Parts List, Aqua-Magic Residence (Rev D).

Commonly confused with this

42049 compared with the numbers it is confused with
42049this page34100
FitsAqua-Magic Style II, Aqua-Magic ResidenceAqua-Magic Style Lite, Aqua-Magic Style Plus
PartWater ValveWater Valve with Drive Arm
Interchangeable—No
  • 34100. The Style Plus uses 34100, a water valve with drive arm. The Style II uses 42049. Different models, different valves.
Superseded by, versus commonly confused withTwo rows. The top row shows 617748 with a solid arrow to 619068, labelled superseded: the manufacturer says to use the new number instead. The bottom row shows 42141 and 34120 side by side with a crossed link, labelled commonly confused: two different current parts that are not interchangeable.SUPERSEDED BY617748619068order this oneCOMMONLY CONFUSED WITH4214134120both current,neither replaces
Superseded by, versus commonly confused with

How to tell which one you have

Thetford’s Style II and Residence parts lists both show 42049 as the water valve, at the same callout position.

Is this part still current?

Yes. 42049 is listed in Thetford Parts List, Aqua-Magic Style II, Rev D (11/4/2025), which is the current parts documentation we hold for this model.

Check this before you order

  • Confirm the toilet is a Style II or a Residence.

Everything documented for this appliance

Not the part you are holding?

Search by number, or check how to tell two similar-looking parts apart before you order.

Search by part numberWhy similar parts may not fit

Current marketplace inventory

Listings from eBay

We verified the part above from manufacturer documents. The listings below are current eBay inventory, and eBay sellers set their own titles, prices and shipping.

Checking current eBay inventory…

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Manufacturer
Thetford
OEM part number
42049
Part
Water Valve
Compatible models
Aqua-Magic Style II; Aqua-Magic Residence
Status
Listed in the most recent parts documentation we hold
Commonly confused with
34100
Primary evidence
Thetford Parts List, Aqua-Magic Style II, Rev D; Thetford Parts List, Aqua-Magic Residence, Rev D
Last checked
2026-08-24

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Where our information comes from

We work from the manufacturer’s own documents. We have not installed this part ourselves, so everything here comes from the documentation rather than from a workshop.

Last checked 2026-08-24.