wall-mount-tub-filler

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A wall mount tub filler is a faucet that mounts on the wall beside or above the tub instead of on the tub deck. People searching for a wall mount tub filler usually want to know whether it is a job they can do themselves, what supply conditions it needs, and what the manufacturers expect from the installer. The install sources below answer those questions in general terms. They say the work belongs to a licensed professional, that the wall supply must be set up before the faucet goes on, and that the installer carries responsibility for anti-scald and temperature limiting. They do not give a full set of dimensions for every model or a specific torque for any fitting.

Quick answer

• The Waterworks install guide says the product “must be installed by a professional licensed contractor.” Plan for a licensed plumber for the wall work.
• The California Faucets D Street instructions give a recommended supply pressure of 20 to 70 psi, and say that if water pressure exceeds 70 psi, a pressure-reducing valve should be installed.
• The California Faucets sheet says local codes may require an upstream tempering valve. The two Waterworks documents place the temperature limiting device on the installer.
• Shut off the water supply before any wall work. The sources do not describe a home method for shutting off a wall supply, so a plumber should confirm the shutoff path.
• The sources do not give a universal rough-in height, a torque value for wall fittings, or a verified way to match a filler to an existing wall supply.

How we chose

This post relies on three non-Amazon sources. Two are Waterworks documents for wall mounted tub fillers, one for a model with a regulator and one for a wall mount model with a separate installation guide. The third is a California Faucets install sheet for the D Street wall mount tub filler, which is hosted on the rejuvenation.com domain. Retail product pages and blog guides were not used. Each point below says whether it rests on one document or more. Only the licensed-installer statement rests on two publishers. The anti-scald and temperature limiting points rest on two Waterworks documents, which is one publisher.

The two publishers are Waterworks and California Faucets. Both are plumbing fixture companies that publish manufacturer or brand install documents. The sources are not independent of the brands that sell the products, so their install language should be read as manufacturer guidance, not as an independent code reference. No specific wall mount tub filler is recommended in this post.

What a wall mount tub filler needs before the faucet goes on

The California Faucets D Street instructions open with a licensing statement: “CALIFORNIA FAUCETS RECOMMENDS THAT ALL PLUMBING PRODUCTS BE INSTALLED BY A LICENSED PROFESSIONAL.” The Waterworks wall mount guide says the product “must be installed by a professional licensed contractor.” Two publishers, two documents, the same expectation.

The D Street instructions also make clear that the wall supply comes first. They say “It is the responsibility of the INSTALLER to securely install supply ELL” and the parts that feed the faucet. The instructions then say to “Securely mount the supply ELL (1) and plumbing to studs in wall to provide proper support of wall tub faucet.” This is single-source detail for the D Street model.

The D Street sheet gives a spacing figure for the supply fitting: it says “Supply ELL (1) shall be 6-1/16″ to 7-15/16″ apart.” This is a model-specific dimension from one source. It should not be applied to another wall mount filler without checking that model’s own instructions. The same sheet also gives a through-hole table, which is model-specific as well.

Because the wall supply comes first, the sources treat the wall as the installer’s work. The D Street sheet places responsibility for the supply and its support on the installer. For a homeowner, that means the wall work should be scheduled with a licensed plumber before the faucet is ordered or mounted.

Supply pressure: what the sources give

The D Street instructions list operating specifications. They say “Recommended Supply Pressure: 20 to 70 psi” and “Maximum Flow Rate: 15 gpm,” and add that “Operating pressures between hot and cold supplies should vary no more than 30 psi.” For wall mount fillers these rest on one source. The same 20 to 70 psi range appears in the California Faucets floor-mount sheets, which describe a different product type.

The same sheet says “If water pressure exceeds 70 psi, install a Pressure-Reducing Valve (RPV).” This is a single-source instruction, and it is a valve installation. It belongs to a plumber. A homeowner who does not know the static pressure of the house should not try to measure it and then decide on a valve. The sources do not say how to measure supply pressure.

The 30 psi difference between hot and cold supplies is also a D Street figure. The sheet states it as an operating specification and does not say what happens beyond that limit. Treat the number as the manufacturer’s stated limit for that model.

The sources do not describe pressure at the tub or the flow an individual home will produce. Those depend on the house, and the sources do not measure them.

Tempering, temperature limits, and anti-scald duty

Temperature control is the part of wall mount tub fillers that the sources treat most seriously. The D Street sheet says “Local codes may require installation of an upstream tempering valve.” This is a single-source statement for the wall mount model. The same wording appears in a California Faucets floor-mount tub filler sheet, which covers a different product type, so it is supporting context rather than a second wall mount source.

The Waterworks wall mount guide says “A water temperature limiting device is the responsibility of the installer and must be in accordance with ASSE 1070.” The Waterworks regulator guide says “Anti-scald protection is the responsibility of the installer and according to applicable codes,” and it adds that “A water temperature limiting device is the responsibility of the installer and must be in accordance with ASSE1070.” These two Waterworks documents agree with each other, but they come from one publisher.

ASSE 1070 is named in the Waterworks sources as the standard for the temperature limiting device. The sources name the standard but do not explain how to select or set the device. That is work for a licensed plumber, and the sources do not give a temperature setting.

The sources also say installation must conform to codes. The Waterworks guide says “Be sure your installation conforms to all federal, state, and local codes.” This is a general instruction that applies to any wall mount tub filler, and it points the reader to local requirements rather than to a number.

Shutting off water and working safely

Before any wall work, the water supply must be shut off, and the supply lines must be confirmed as off. The sources do not describe a home method for isolating a wall supply. Shutoff and draining should be done as the plumber directs.

The D Street sheet notes that the faucet’s wall mount needs a drilled hole and anchor, and it describes drilling a 3/16 inch hole for a handshower holder. That step is from one source for one model. Drilling into a wall can reach wiring and pipes, so the sources’ drilling step should be read as a job for the plumber who is already on the wall.

Do not treat any of these steps as a substitute for a licensed installer. The sources say the installation must be done by a licensed professional.

What the sources say about the faucet itself

The Waterworks regulator guide is titled as a wall mounted exposed tub filler with handshower and handles. The sources do not describe what the regulator does in detail, so this post does not explain how a regulator interacts with a tempering valve elsewhere in the house.

The D Street sheet describes a handshower holder that mounts on the wall, with an anchor, base, screw, and hook. It says the installer must discuss with the consumer which side the handshower should be placed on before proceeding. That is an install-time decision, and the sources treat it as a conversation between installer and owner.

The sources do not say how long a wall mount tub filler lasts, what finish to choose, or how to clean the spout. They do not give a warranty term.

Practical checklist for a wall mount tub filler job

• Confirm with a licensed plumber that the wall supply can be fixed to studs before buying or mounting the filler.
• Check the supply pressure with the plumber against the 20 to 70 psi range the D Street sheet gives for that model.
• Ask whether a pressure-reducing valve or an upstream tempering valve is required under local codes. The D Street sheet names both as possibilities.
• Confirm the temperature limiting device and that it is in accordance with ASSE 1070, as the Waterworks guide says.
• Shut off the water supply before any wall work, and do not start cutting or drilling until the plumber confirms the shutoff.
• Follow the model’s own instructions for the supply spacing, the through-hole, and the anchor. The dimensions in this post are for the D Street sheet only.

Related reading on this site may help with the shower side of a tub setup. hand held shower heads for a tub faucet covers the spout-side question. showerheads for low water pressure covers flow questions that a pressure check may raise. Neither post replaces the licensed install guidance above.

What we could not verify: what the sources do not say

The sources do not give a rough-in height for the wall supply or for the filler spout. The D Street spacing figure is model-specific, and the sources do not show how to convert it to another model.

The sources do not give torque values for wall fittings, escutcheons, or the handshower holder. No torque figure is given here.

The sources do not say how to choose between a regulator model and a model without one, or which option suits a house with a particular supply pressure.

The sources do not say whether a wall mount tub filler will fit a given wall, stud spacing, or tub depth. The Waterworks and D Street documents describe their own model dimensions only.

The sources do not describe the standard for the temperature limiting device beyond naming ASSE 1070. They do not give a setting, a temperature, or a valve brand.

The sources do not say how a wall mount tub filler performs in use, how often it needs service, or what repair parts cost. This post makes no claim about any of those.

The temperature limiting duty and the code reference rest on Waterworks alone. The tempering valve point and the pressure figures rest on one wall mount document each.

FAQ

Can a homeowner install a wall mount tub filler?

The Waterworks guide says the product “must be installed by a professional licensed contractor.” The California Faucets sheet recommends that all plumbing products be installed by a licensed professional. Plan for a licensed plumber.

What supply pressure does a wall mount tub filler need?

The D Street sheet gives a recommended supply pressure of 20 to 70 psi for that model. It says a pressure-reducing valve should be installed if pressure exceeds 70 psi. Other models may differ, so check the instructions for the model you are considering.

Who is responsible for anti-scald protection?

The Waterworks documents say anti-scald protection and the temperature limiting device are the responsibility of the installer, and that the device must be in accordance with ASSE 1070.

Do I need a tempering valve?

The D Street sheet says local codes may require an upstream tempering valve. Whether one is required in your home depends on local codes, which the sources do not list. Ask your plumber.

Should I shut off the water before working on the wall?

Yes. Shut off the supply before any wall work, and have the plumber confirm the shutoff. The sources do not describe a home method for isolating the wall supply.

What dimensions do I need for the wall supply?

The D Street sheet gives a spacing of 6-1/16 inches to 7-15/16 inches for its supply fitting. That figure is for that model. Use the instructions for your own model and have the plumber confirm the spacing.

Bottom line

A wall mount tub filler is a wall-mounted faucet that needs a supported wall supply, a licensed installer, and a check of supply pressure and temperature control before it goes in. The manufacturer documents agree on the licensed installer point and on the installer’s duty for the temperature limiting device. The pressure and spacing figures belong to one model, not to all wall mount fillers. If the house has high supply pressure or no tempering device, the plumber should decide what is needed.

Sources

• Waterworks, wall mount tub filler installation guide. https://assets.waterworks.com/wasset/143/original/128343.pdf (saved copy checked 2026-10-27)
• Waterworks, wall mounted exposed tub filler with regulator and handles. https://assets.waterworks.com/wasset/137/original/110537.pdf (saved copy checked 2026-10-27)
• California Faucets, D Street wall mount tub filler installation instructions (hosted on rejuvenation.com). https://rejuvenation.com/netstorage/images/pdfs/instructions/D-Street-Wall-Mount-Tub-Install-Spec.pdf (saved copy checked 2026-10-27)