tub-diverter

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A tub diverter is the part on a bathtub spout that sends water up to a showerhead when you pull it or lift it, and back down into the tub when you release it. Most people shopping for one want to replace a worn or stuck tub spout without calling a plumber. The first question is the connection, not the finish. The listings in this review fall into two groups: spouts that slip over a 1/2-inch copper pipe and are held by a set screw, and spouts that thread onto a male threaded pipe. The two are not interchangeable, so the fit has to match what is already in your wall before anything else matters.

Quick answer

• Check the connection first. Look for a small hex set screw under the spout near the wall, which usually means a slip-fit spout on copper. No screw usually means a threaded spout.
• Shut off the water supply before any work. The Moen diverter-gate guide says the supply shut-off valves must be turned off first.
• Of the nine listings in the product file, eight are complete tub spouts with a diverter. One, the Moen 101237, is a replacement cup seal and diverter gate for a Moen 3800 tub spout, not a full spout.
• Five listings are slip-fit for 1/2-inch copper: American Standard, TEVIORA, Fosenlion, QWORK, and Moen 15856CBN. Danco and Prime-Line are threaded only. The Delta RP17453 lists either a sweat connection to copper or a thread onto 1/2-inch IPS.
• Damaged valve or pipe? Stop and call a licensed plumber rather than forcing the job.

How we chose

This post uses the nine listings in the product file, read on 2026-10-27. The criteria were simple. A listing had to describe a tub spout or diverter part, and it had to state a connection type or a pipe size that a reader could check against their own pipe. Nothing was ranked by price, rating, review count, or badge, and those fields were not recorded. A listing stays in the post even when the file gives it a short fact list, but the post says so.

Each product section repeats only what the listing or the file says. Where a listing gives a figure, the section says “the listing says.” Where the file has no figure, the section says the figure is not stated. The post does not claim a ranking, and it does not say which spout is best. The right choice depends on the pipe in your wall, and the sources do not decide that for you.

Before you start: shut off the water and check the pipe

Turn off the water supply before you loosen anything. Moen’s guide for its diverter gate says that the water supply shut-off valves must be turned off, and it points to a separate article on how to shut off the supply to a faucet. If you cannot shut off water to the tub, do not start the job.

Next, find out what the pipe is. Look under the spout, near the wall. A small hex set screw there usually means the spout is a slip-fit that slides over a smooth copper pipe. Danco’s guide for a copper slip connection says to remove the set screw before you rotate the old spout off. If there is no screw, the spout is most likely threaded, and you will need to see the thread on the pipe or the old spout.

Measure the pipe as well. The listings give different length ranges, and the sources give different ones too. The product section for each spout lists what that listing says. Check the range printed in the instructions for the spout you buy against the distance from your finished wall to the end of the pipe. Do not assume one range covers every spout.

If the valve, the pipe, or the wall shows damage, such as a cracked valve body, corroded pipe, water behind the wall, or a leak you cannot trace, stop the job and call a licensed plumber. A replacement spout does not fix a damaged valve or a failing pipe, and forcing the connection can make the damage worse.

Slip-fit or threaded: the rule that decides the purchase

A slip-fit spout does not fit a threaded pipe, and a threaded spout does not fit a copper slip-fit connection without an adapter. Danco’s listing for its 88052 spout states this plainly: it “ONLY FITS A THREADED PIPE connection; it DOES NOT FIT a copper pipe slip-fit connection.” The Prime-Line listing makes the same point from the other side, saying its spout is for a 1/2-inch male pipe and “not for copper pipe (no adapter included).”

The Delta answer for its RP48718 slip-on spout adds a useful detail. Delta states that the RP48718 “can only be used as a slip on to a copper pipe,” and that it “uses 1/2 inch threads” for its thread connection. Delta’s answer also gives a copper length of “5/8 to 1 5/8 inches from the wall” for that model, which is a different range from the listings below. That difference is the reason to check the exact model you plan to buy, not a range copied from another product.

The nine listings, one by one

Each heading below names a listing. The bullets are facts from the listing or the product file. Where a fact is missing, the section says so.

American Standard Universal 4 in Slip-On Diverter Tub Spout, Polished Chrome

• The listing title describes a diverter tub spout. The bullets describe a solid metal spout with a slip-on set-screw install for 1/2-inch copper water tubes.
• Listed specs: polished chrome, one hole, spout reach 4.75 inches, spout height 32 millimeters, weight 45 grams.
• The listing says “Limited Lifetime Warranty.”
• The listing does not explain how the diverter moves water. The spec sheet also lists a “Cartridge Valve” as the valve type, which does not fit a spout alone, so confirm with the maker what this part includes.
• Diverter: named in the title, not described. Classified as a tub diverter spout.
• View on Amazon

Delta Faucet RP17453 Tub Spout, Chrome

• The listing says “Pull down to divert.” It also says “Designed exclusively for Delta faucets” and “Genuine Delta repair part.”
• Connection: “Sweat onto 1/2inch C.W.T. or thread onto 1/2inch IPS.” That gives two ways to fit the spout, so the installer should match the choice to the pipe.
• Listed dimensions: spout height 6 inches, spout reach 5.25 inches.
• The spec sheet lists the material as plastic, while the title and finish say chrome. Confirm the material with Delta before you buy.
• Warranty per the listing: “Lifetime Faucet and Finish Lifetime Limited Warranty.”
• Diverter: described in the bullets as a pull-down diverter. Classified as a tub diverter spout.
• View on Amazon

TEVIORA Tub Spout with Pull-Down Diverter, Leak Proof Slip Fit

• The listing says it is designed to fit most 1/2-inch copper slip-fit connections. It says the copper should extend 1-1/2 inches minimum and 3 inches maximum from the finished wall.
• The listing says the package includes a 5/32-inch hex wrench, a lift rod, a stem, an internal gate, and a set screw.
• The listing gives a flow rate of 1.2 gpm. The listing does not say how that figure was measured.
• Finish: brushed, chrome color. Spout dimensions in the spec sheet: 5.7 inches deep, 2.7 inches wide, 2.9 inches high.
• Diverter: the bullets describe a front-mounted pull-down diverter. Classified as a tub diverter spout.
• View on Amazon

Fosenlion Tub Spout with Lift Rod Diverter, Slip Fit

• Connection: slip-fit onto a 1/2-inch copper pipe. The listing gives the same 1-1/2 inch minimum and 3 inch maximum pipe extension from the finished wall as the TEVIORA listing.
• Included: a tub spout set, with the listing describing a lift rod and internal gate. It also lists a 5/32-inch hex wrench.
• Flow rate per the listing: 1.2 gpm.
• Listed dimensions: 5.2 inches deep, 1.5 inches wide, 2.5 inches high. The spec sheet calls the spout design “traditional curve,” while the style is listed as modern.
• Diverter: pull-down, described in the bullets. Classified as a tub diverter spout.
• View on Amazon

Danco Tub Spout with Front Pull-Up Diverter, Chrome (88052)

• Connection: threaded. The listing says the spout “ONLY FITS A THREADED PIPE connection” and “DOES NOT FIT a copper pipe slip-fit connection.”
• The listing says the spout has “1/2 in. IPS inside threads” and fits a “4 in. – 4-1/2 in. stub out from tiled wall.”
• The listing says the threads measure “3-3/4 inch” from the back of the spout, and that the pipe nipple should be “at least 4 in. long.”
• The listing says you will need adjustable pliers and plumber sealing tape.
• Listed dimensions: 5-inch reach, 4.5-inch spout height. Warranty per the listing: “1 year limited warranty.”
• Diverter: front lift rod, described in the bullets. Classified as a tub diverter spout.
• View on Amazon

Prime-Line MP54510 Tub Spout with Diverter, 1/2 In. FIP, Chrome

• Connection: “1/2 inch female iron pipe (FIP)” fitting, which the listing calls “Designed to fit a threaded male 1/2 inch diameter pipe.”
• The listing says “not for copper pipe (no adapter included).”
• Listed length: 5-1/4 inches. Spout reach in the spec sheet: 5.25 inches.
• Material: zinc diecast with a chrome-plated finish. The listing says “Please measure your existing pipe before ordering.”
• Diverter: named in the title as a tub spout with a shower diverter. The bullets do not describe how the diverter moves. Classified as a tub diverter spout.
• View on Amazon

QWORK Metal Tub Spout with Diverter, Chrome

• Connection sizes listed: 1/2-inch copper pipe, 1/2-inch IPS, and 3/4-inch IPS, “with included adapters and sealing tape.”
• The listing says the install works only when the pipe extends 1.5 to 3 inches from the wall, and it tells the buyer to verify the measurement before installation.
• Included: diverter bathtub spout, hex wrench, extension nipple, and PTFE tape, per the listing.
• Material: copper in the spec sheet, with a chrome finish.
• Diverter: the bullets say the built-in diverter “allows easy switch between shower and tub water flow.”
• Warranty type in the spec sheet: limited. The listing does not give a warranty length.
• View on Amazon

Moen 101237 Cup Seal and Diverter Gate for 3800 Tub Spout

• This is a replacement part, not a complete tub spout. The listing names a “Cup seal & diverter gate, 3800 tub spout.” Use it only if you already have a Moen 3800 spout.
• The listing calls it an “Authentic Moen replacement part” and says it is “Backed by Moen’s Limited Warranty.”
• The spec sheet lists a deck mount, which does not describe a tub spout part. Match the part number against your spout before you buy.
• Moen’s guide for replacing a diverter gate describes the steps: pull up the lift rod while gently prying the tabs apart with a small flathead screwdriver, slide the washer in with its flat side outward, and snap the gate’s tabs onto the lift rod.
• Diverter: the gate itself. Classified as a diverter part, not a full tub diverter spout.
• View on Amazon

Moen 15856CBN Commercial Diverter Tub Spout, Brushed Nickel

• Connection: “1/2-INCH CC SLIP FIT CONNECTION,” for compatible 1/2-inch copper pipe.
• The listing says a slip-fit spout can be identified “by a set screw located on the underside of the spout near the wall.”
• Diverter: “PULL-UP DIVERTER,” which the listing says “easily redirects water from the tub spout to the showerhead.”
• Listed length: about 5-1/2 inches. Spout reach in the spec sheet: 5.5 inches.
• Finish: brushed nickel. Warranty per the spec sheet: “5 Year Limited.”
• The brand field is blank in the product file, but the listing names the manufacturer as Moen Incorporated.
• View on Amazon

Install steps the manufacturers publish

The steps below come from the opened manufacturer pages. They are general. Your spout’s own instructions override them. Shut off the water before you start, as covered above.

• Remove the set screw first on a slip-fit spout. Danco says: “If your Tub Spout has a set screw holding it in place, be sure to remove that prior to rotating the Spout off.”
• Turn the old spout counterclockwise to remove it. If it is hard to remove, Danco’s guide says you may need the end of a hammer or a large wrench to help loosen it while turning.
• Clean the pipe end. Danco says to use sandpaper to remove burrs and sharp edges and to polish the copper to a smooth finish.
• Apply sealant or grease where the instructions call for it. Danco’s steps include a thin layer of silicone grease on the stub-out nipple and a compression washer, both from its own guide.
• Wrap the threads. Danco says to “Apply a minimum 4 to 5 rounds of included thread tape” to the extension nipple’s external threads. Follow the tape count in your own instructions.
• Tighten the set screw only until it is snug. Danco says: “Stop tightening when the screw head is near flush with the adapter.” Delta’s guide says: “Do not over-tighten set screw.”
• Turn the water on and check for leaks. Danco says: “If water is leaking from the rear of the Tub Spout, reinstall, as this could damage your wall.”

Common mistakes to avoid

• Buying a threaded spout for a copper slip-fit pipe, or the reverse. The listings state which one they fit, and the Danco and Prime-Line listings say it outright.
• Skipping the water shut-off. Moen’s guide makes this the first step.
• Using one length range for every spout. The TEVIORA, Fosenlion, QWORK and Moen 15856CBN listings give a range from 1-1/2 to 3 inches, while Delta’s RP48718 answer gives 5/8 to 1 5/8 inches. These describe different products.
• Forcing a stuck spout with a wrench on the spout body. Danco’s guide suggests removing the set screw first, and it warns about the wall when a leak comes from behind the spout.
• Replacing the spout when the valve or pipe is the real problem. If the diverter is stuck in one position, the problem may be inside the spout or the valve, and a plumber should check it.

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

The sources opened for this post do not give a single pressure rating, a torque figure, or a flow standard for any tub diverter spout. Those points are not in the four pages opened, so this post gives none. The listings state flow figures for two spouts, but the listings do not say how the figure was measured or whether it applies to the diverter position.

• The sources do not state a torque value for a set screw or a fitting. Danco and Delta say only “do not over-tighten” or “stop tightening when” a point is reached.
• No listing or opened source gives a pressure rating for a tub diverter spout.
• The sources do not say how long a tub diverter spout lasts, and the listings give warranty terms only.
• No source in this post covers the specific valve brand in your wall. The thread and fit must be checked on the product and on the pipe you have.

FAQ

Is a tub diverter the same as a tub spout?

No. A tub spout is the outlet that fills the tub. A diverter is the part inside or on the spout that changes the water flow between the tub and a showerhead. Most of the listings here are complete spouts with a diverter built in. The Moen 101237 is only the diverter gate for a Moen 3800 spout.

How do I know if my spout is slip-fit or threaded?

Look under the spout where it meets the wall. A small hex set screw usually means a slip-fit spout over copper. Danco’s guide describes removing that screw before the spout comes off. If there is no screw, the spout is likely threaded, and you should confirm the thread on the pipe or the old spout before ordering.

Can I use a threaded spout on copper pipe?

Not without a fitting made for that purpose. The Danco listing says its 88052 spout “DOES NOT FIT a copper pipe slip-fit connection.” The Prime-Line listing says “not for copper pipe (no adapter included).” Check the listing for an adapter before you buy, and check the instructions for the exact parts in the box.

Do I need to shut off the water?

Yes. Moen’s diverter-gate guide says the water supply shut-off valves must be turned off before you start. If you cannot shut off the water to the tub, do not begin the job.

What if the spout is stuck or the pipe is damaged?

Do not force it. Danco’s guide suggests removing the set screw first and warns that a leak from behind the spout can damage your wall. If the valve or pipe is cracked, corroded, or leaking, stop and call a licensed plumber.

Do the listings say how much water a tub diverter spout uses?

Two listings, the TEVIORA and Fosenlion, give a flow rate of 1.2 gpm. The other listings do not state a flow rate. The product file does not explain how the figure was measured.

Bottom line

Match the connection before anything else. If your pipe is smooth copper with a set screw on the spout, look at the slip-fit listings and check the pipe-length range against your wall. If your pipe is threaded, look at the threaded listings and confirm the thread size on your pipe. Shut off the water first, and call a licensed plumber if the valve or pipe is damaged.

Related reading on this site: bathtub diverter spout replacement, step by step, shower diverter options, how to install a handheld shower head, how to measure a shower arm thread size, and handheld shower heads for a tub faucet.

Sources

• Moen, “Replacing a Tub Spout Diverter Gate,” https://solutions.moen.com/Article_Library/Replacing_a_Tub_Spout_Diverter_Gate (opened 2026-10-27)
• Moen, “91192 Diverter Kit,” https://solutions.moen.com/Article_Library/91192_Diverter_Kit (opened 2026-10-27)
• Danco, tub spout installation guide, https://www.danco.com/?p=9831 (opened 2026-10-27)
• Delta Faucet, RP48718 product page and customer answers, https://www.deltafaucet.com/bathroom/product/RP48718.html (opened 2026-10-27)