Why would a shower control become stiffer to use? The system in the house be a boiler, hot water reservoir and...
The system in the house be a boiler, hot water reservoir and water container in the loft. The shower is losing the tiles with a round fitting poking through the tiles, beside a silver trim. You turn the main dial for hose down and has an inner dial for wet temp. The hot and cold feed must progress into the back of it to mix.
The boiler system have been changed to a combi and where on earth the tank be, the two pipes to the shower poke through an thus plumbed to the new system. So the shower section has not be touched.
As from that day, turning the shower dial have become very stiff. Is this because the shower is not compatible near a combi system?
Answers: If you know how, take the shower body out, lug it apart and grease everything, most will work fine after this, it is the increased pressure on the hot water side and is adjectives with combi conversions.
Maybe you're stroking it the right road :-}