trailer only 2 years old- Toilet bowl not holding water- So my guess is - it could be the seal. When i depress pedal- it opens but need water to stay in bowl. My neighbor says it has to be something stuck in there- ( i don't see anything). Any suggestions? if it is the seal- how do you change it?

Clean the seal and then lube with Plumbers Silicone or olive oil. DO NOT use anything petroleum based. Replacement varies by type of toilet.

Mine did that a few weeks ago and I also couldn't see anything in there. I put on a latex glove and with the pump turned off I held the valve open with one hand. Then I reached down and ran my gloved finger around under the seal and around the blade. I never felt anything foreign, but it now holds water again so I'm happy.

I never let the bowl go dry...... with water always in it my seals never get dry, which maintains their ability to seal.

Thetford toilets have a double seal gasket where the blade slides in.Thetford made/makes a tool to clean it.I made one out of a metal coat hanger. I bent one end with about a one inch point. The length is about 6-8 inches. Insert short into groove to remove any debris.

I replaced the seal in mine yesterday. Took 5 minutes. Very easy job.

toilet bowl water | Good Sam Community

bob213
Explorer
Apr 20, 2021
Clean the seal and then lube with Plumbers Silicone or olive oil. DO NOT use anything petroleum based. Replacement varies by type of toilet.
opnspaces
Navigator II
Apr 20, 2021
Mine did that a few weeks ago and I also couldn't see anything in there. I put on a latex glove and with the pump turned off I held the valve open with one hand. Then I reached down and ran my gloved finger around under the seal and around the blade. I never felt anything foreign, but it now holds water again so I'm happy.
Ed_Gee
Explorer II
Apr 20, 2021
I never let the bowl go dry...... with water always in it my seals never get dry, which maintains their ability to seal.
enblethen
Nomad
Apr 20, 2021
Thetford toilets have a double seal gasket where the blade slides in.
Thetford made/makes a tool to clean it.
I made one out of a metal coat hanger. I bent one end with about a one inch point. The length is about 6-8 inches. Insert short into groove to remove any debris.
stro1965
Explorer
Apr 20, 2021
I replaced the seal in mine yesterday. Took 5 minutes. Very easy job.
Jframpey
Explorer
Apr 20, 2021
Check out “RV toilet seal replacement” on YouTube... dozens of videos!
Terryallan
Explorer II
Apr 20, 2021
Ed_Gee wrote:
I never let the bowl go dry...... with water always in it my seals never get dry, which maintains their ability to seal.

Agree. Especially when winterizing. I always put pink in the bowl to keep the seals wet, and lubed
rexlion
Explorer
Apr 20, 2021
Terryallan wrote:
Ed_Gee wrote:
I never let the bowl go dry...... with water always in it my seals never get dry, which maintains their ability to seal.

Agree. Especially when winterizing. I always put pink in the bowl to keep the seals wet, and lubed
Strange that this works for seals but not for dolphins... :D
larry_cad
Explorer II
Apr 20, 2021
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Pipeman
Explorer
Apr 20, 2021
I just cleaned mine 2 days ago and went to the trailer yesterday to see if the anti freeze stayed in the bowl. It did and I'm happy again. I used a latex glove and some paper towel to clean the seal and bowl up. I then held the valve open and ran my fingers around the underside of the opening with scuba diver lube. When I flush I try to make sure that the blade is seated properly by letting the blade slam from the open position. The rubber around the opening has to be cleaned every once in a while with a toilet bowl brush.