Shower mixer taps can be found at stores like Lowes or The Home Depot. It would be found in the Plumbing department in the store. You could also look for the product online if you have the dimensions written down, you could find one that you fit perfectly.
I would just connect it to the mixer without reducing it to 3/8".
I installed mine just out the shower... where I dry off... its warm
When installing things like shower doors, although you can do it yourself, I would suggest getting the help of a professional. This is because you want to be sure that it has been installed securely, and they will have more experience than you in installing it.
It depends on the size you want. Depending on the styling and brand the price can range from $ 1200 to $ 4000
I would suspect you it was installed incorrectly, it is a bad starter, or the flywheel is broken or has a missing tooth.
Combination taps for a bath/shower set up can be found at many home improvement sites and stores. The typical cost for a good quality set would be anywhere from 30 to 45 pounds in the United Kingdom.
Stopped up vent or improperly installed vent.
Bathroom lighting is installed the same as any other lighting fixture would be. The only difference is they are sealed off so moisture cannot ruin the electrical wiring.
An email to all staff (with an instruction not to print it) might be enough.
It depends on the mixer. If you wan't to buy different attachments you should contact the mixer company and find out if they would fit.
Replace the shower valve (faucet). I would call a plumber to check it out. Because there may be another reason, it depends on other things besides faucet. Like a crimped water line under slab floor, if you have copper water lines, i have seen the cooper pipe go all the way into a tee and block off the outlet to the faucet. If it has been like i have mentioned above it would have been like this since day one. It would help if people would tell how old there house is and how long has the problem been going on. And yes it could be very much the faucet itself if it just starting do it. IN ADDITION: This also depends if the shower has a mixer or tap (faucet) installed, as the question didnt stipulate this. The rest of the house could have taps and the shower have a mixer. Mixers need a minimum pressure of 400 kpa from the hot water tank (geyser) to work. If the hot water tank is of a lower pressure this would explain for its poor performance.
It is possible to do a walkin tub shower installation all by yourself. However, if you have never installed anything like this before it would be best to have someone with experience put it in.