How do you adust the anti scald mixter on my Pegasas falcet?

Question

I have a Pegasas shower falcet, the hot water keeps going cold after it is turned on, I did not get any instructions for adjusting the anti scald device, and I think it may be the problem. so how do I adjust this valve so I will have hot water with no change. I have a on-demand water heater which is only 5' from this shower and it keeps the water super hot, so I know adjustment of the valve must be the problem.

Answer 1

It's probably a limit under the handle.  That is, something under the handle that limits how far it can turn.

Tankless water heaters have to have a certain flow to fire up, though.  If you've got a super water-saver shower head, that might be part of the problem.  It would be easy to check - just see how it works with the shower head off.