Installation
Redoing a shower in a weekend, without opening the wall
An American shower has one valve in the wall and one 1/2-inch arm coming out of it. Everything that threads onto that arm can be changed in a weekend without a plumber; the valve behind the tile cannot. This list stays on the arm side of the wall. Prices are Amazon.com, read on October 29, 2026.
By Jean-Benoit Buisson
Four changes on the arm side of the wall, from the one that changes the shower most.
1. Overhead rain, on an arm
A rain head on a standard wall arm leans forward and sprays your face. The Hibbent 10-inch head with a 16-inch extension arm brings it out and holds it level, cUPC listed, at about $36. It is the one change on this list that makes a shower feel new, without ceiling plumbing. Tighten the lock joints as the maker describes: a head on a long arm is a lever on the wall fitting.
2. A handheld that also cleans
The AquaCare 8-mode handheld brings a 72-inch hose, a second low bracket for sitting or for children, and a fan-shaped power wash for rinsing tile, at about $30. Its page gives two flow figures, 1.8 and 2.5 gpm; in a low-flow state, confirm which version ships.
Plastic heads crack at the thread. The HammerHead 8-inch rain head is solid metal on 1/2-inch NPT brass threads, at about $80 and 2.5 gpm — outside the low-flow states.
4. A handheld that docks itself
The Moen Engage snaps back into its holder by magnet, publishes its face, height and projection from the wall, and has a 60-inch metal hose, at about $70. It is also 2.5 gpm.
What a weekend cannot fix
A temperature that swings when someone flushes, a valve that drips behind the handle, a shower pan that holds water. Those live behind the tile and under the floor. When it is time for that work, the shower systems on this site come with the valve.
Prices quoted in this text were read on October 29, 2026. The live price is at the top of the page.
The questions we get
What can I change without opening the wall?
The shower head, the shower arm, a handheld and its hose, an extension arm, and the valve trim — handle and plate — if the maker sells a trim for the valve you have. The valve body and its cartridge are behind the wall; replacing them means cutting access.
What thread is a shower arm?
1/2-inch NPT on American and Canadian showers. Wrap the arm's thread with two or three turns of plumber's tape in the direction the head screws on, and tighten by hand plus a quarter turn.
Can I add a rain head and keep a handheld?
Yes, with a diverter on the arm or a combination head. The supply stays the same, so two outlets share one flow; on weak pressure, choose one outlet at a time.
What about the temperature swinging?
That is the valve, not the head. A pressure-balancing or thermostatic valve fixes it, and fitting one means opening the wall. The shower systems on this site include the valve for that job.
What flow should I buy?
The federal limit is 2.5 gpm. California, Colorado, New York, Washington and several other states limit shower heads to 1.8 or 2.0 gpm; check yours before buying a 2.5 gpm head.