Replacement Water Valve, Waste Ball, and Vacuum Breaker Parts for Thetford Aqua-Magic Style II 42070

Updated 10/20/2026 | Published 10/18/2026

Products Featured in This Question

Replacement Water Valve for Thetford Aqua-Magic Style II RV Toilet - Restores Flush Power - Qty 1

(63)

$26.35

Replacement Waste Ball Drive Arm Kit for Thetford Aqua-Matic Style II RV Toilets

(28)

$29.68

Replacement Vacuum Breaker for Thetford Aqua Magic Style Plus, Style II, and Style Lite RV Toilets

(2)

$30.74

Thetford Toilet Seal Lubricant & Conditioner - 24 oz

(34)

$10.69

Question:

Looking for a water valve kit for the Thetford style III toilet unit no. 42070 E275AA5001354 It is in a 2024 Forest River Rockwood travel trailer. I think it is the same as the style II toilet unit. Can you find out for me please. If it is the same parts kits. I will need Qty 1 water valve kit. Qty 1 dump valve kit. Qty 1 vacuum break kit. And Qty 1 bottle of Thetford toilet seal lube and conditioner.

asked by: Clyde H

Expert Reply:

Hey Clyde!

Good news; your Thetford 42070 is actually part of the Aqua-Magic Style II lineup, so the Style II replacement parts are the correct ones for your toilet.

Here are the parts you're looking for:

Water Valve Kit # TH78SA – Replaces the water inlet valve.

Waste Ball Drive Arm Kit (and seals) # TH34FR53CF – Operates the flush ball when you press the pedal.

Vacuum Breaker Kit # TH34FR96BX – Includes the vacuum breaker, hoses, and clamps.

Toilet Seal Lubricant & Conditioner # TH49HE – 24-ounce bottle to help keep the seals lubricated and conditioned.

One thing I'd like to double-check: When you mention the dump valve kit, are you looking to replace the actual flush ball and seal, or the mechanism that opens and closes it? I want to make sure we get you all the right parts!

expert reply by: Andrew N

Clyde H.

10/19/2026

Hello Andrew N. Thank you getting back to me. Excellent Question: the flush ball valve kit is good. Now that you asked the question. Is the foot peddle lever available as well? Is this the other opening and closing mechanism you were asking about? This is the side lever pedal type. When we finish emailing I will call you to order the parts and items availabile.

Andrew N.

10/19/2026

@ClydeH You're welcome. And we do not have the foot peddle lever but Thetford may have that if you need it; that would require reaching out to them. Thanks for your business. I don't have a line to take calls personally, but you can add the items to your cart and checkout really easily that way :). Otherwise we have a customer service line at 1-800-940-8924

Clyde

10/19/2026

@AndrewN thank you Andrew N. I just called and ordered all of the parts kits with two bottles of lube from Kayleigh. I used the phone number in my phone. Thank you for your help. Much appreciated.