Replacing the Base Valve Gasket in a Jabsco Manual Marine Toilet

Changing out the base valve gasket in a Jabsco Twist 'n' Lock manual marine toilet is a pretty straightforward task. Make sure you have a replacement base valve gasket (part number 29043-0000), a good pair of rubber gloves, and close the seacocks.

Jeff: Welcome to jabscotech.com. I'm Jeff Lander.

Mike: And I’m Mike Irving.

Jeff: And today, we're going to instruct you on how to replace the base valve gasket.

Mike: Now big thing on this one is you are going to be coming in contact with the waste so make sure you use safety precautions including wearing plastic gloves.

Jeff: This is a pretty simple repair as all you need is a Phillips head screwdriver for the four screws here at the base, a pan for any residual waste or water, and a replacement base valve gasket which has a part number of 29043-0000.

Now like Mike said earlier, make sure you have your gloves handy when you're working at this part of the toilet. So pretty simple to start. Take out these four Phillips head screws from the from the base. Remove the pump, and then you'll expose the base valve gasket.

This is a pretty simple install as this gasket can only go on to the base one way. Now this gasket will go with the bump facing up and then the three holes here will mate with the three posts on the base. As you can see these three holes will mate with the three posts. If you were to try to put it in the other way, it wouldn't work because all the holes wouldn’t have mate up with the post. So again, this gasket can only go in one way, bump facing up, these three holes mating with the three posts at the base.

Mike: When you pull out the old base off gasket, go ahead and just kind of inspect it carefully. Look to see if there's a gap right between the flap and the outside black plastic. If there's no gap that tells me that there's either a little bit of wear on that hinge, or maybe some household cleaning chemicals were used to clean the toilet and it could have damaged the rubber. Always remember, try not to use any chemicals in these toilets.

Jeff: Now that we swapped the base valve gasket, we simply put the pump assembly on top. Take our four Phillips head screws. Reinstall them. So now that we reinstalled the new base valve gasket we simply put the pump assembly back on top of the base and screw down the four Phillips head screws. The one thing I want to make you aware of is that you don't have to tighten these down and crank them down super hard because basically if you hand tighten these to the plastic that will steal the rubber valve and it will not allow the toilet to leak. So again, don't crank these down too hard, because you will risk cracking the plastic.

Thank you for watching our install video on the base valve gasket, part number 29043-0000. I'm Jeff Lander.

Mike: And I’m Mike Irving.

Jeff: Be safe and happy travels.

Mike: And check back on jabscotech.com for more videos.