I'm not following something here Les (Bigboomer). If the pedal uses a properly operating spring to close the valve then should the water pressure matter? The installation of a shut off which you did would not fix the problem but would be an alternative to shutting off the water supply in case you needed to temporarily work around a defective valve that wouldn't shut off. We have RV'd at some campgrounds with low pressure and I'd hate to think my toilet doesn't work right because of it. I can't help a slower trickle, but a non-functional toilet is intolerable. I'd fill the fresh tank and use the rig's pump which hopefully delivers the pressure that's needed.
I guess I would have to see how the valve is put together and how the valve gets closed by the spring pressure. I've never taken my toilet apart, so maybe I should just so I can see how it works in case I have to debug something when there is a problem. Thanks for the heads-up.
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