Set Screw or Threads? Best Bathtub Spout Replacements for Slip-Fit and IPS Pipes

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The best bathtub spout is the one that fits the pipe sticking out of your wall. Replacement spouts connect in one of two main ways: a slip-fit spout slides over a smooth 1/2-inch copper pipe and locks with a set screw underneath, while a threaded spout screws onto a 1/2-inch IPS (iron pipe size) nipple. Get that wrong and the new spout won’t seal, no matter how nice the finish.

We compared seven spouts sold by Amazon.com: two Moen replacement parts (one slip-fit, one threaded), two Delta parts, a budget threaded spout from Prime-Line, a Danco universal kit with adapters, and a brushed nickel Moen Brantford. Most include a diverter that sends water up to the showerhead, and we note whether each one pulls up, pulls down or resets on its own.

Before you buy, look under your current spout for a set screw and measure how far the pipe extends from the wall.

Our Top Bathtub Spout Picks at a Glance

Price key: $ under $50 · $$ $50–$100 · $$$ $100–$175 · $$$$ $175+. Prices change often; check Amazon for today’s price.

1. Moen 3931 Tub Diverter Spout, 5.5 in, Chrome: Best Overall Slip-Fit

Moen’s 3931 is an authentic Moen replacement tub spout: a 5.5-inch chrome diverter spout with a 1/2-inch CC connection. CC stands for copper-to-copper, and in practice it means the spout slides over a smooth copper pipe rather than screwing onto threads.

On a slip-fit spout, a set screw on the underside clamps the spout to the pipe, and an internal seal keeps water from leaking back toward the wall. To install one, you loosen the old spout’s set screw, pull it off, clean the pipe and slide the new spout on until it meets the wall, then tighten. The included lift rod sends water up to the showerhead when you pull it, and the listing describes it as letting the stream flow through the tub or up to the showerhead.

The finish is Moen’s chrome, which the listing calls highly reflective with a mirror-like look that works with any decorating style. Moen backs it with a Limited Lifetime Warranty. The listing doesn’t state the spout’s material or include installation steps, so check the instructions in the box, and turn off the water before you remove the old spout.

It suits anyone with an existing Moen slip-fit spout, or any 1/2-inch copper stub-out of the right length, who wants a like-for-like chrome replacement with a diverter.

Why we like it

• Simple slip-on install with a set screw
• Lift rod diverter
• Limited Lifetime Warranty

Watch out for

It fits smooth 1/2-inch copper only; a threaded pipe needs an IPS spout instead.

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2. Moen 3800 Tub Spout with Diverter, Chrome: Best Threaded Spout With Auto-Reset Diverter

Moen’s 3800 is a chrome tub spout with a diverter for threaded plumbing. It installs onto a 1/2-inch threaded pipe or threaded adapter extending from the wall, and the listing says IPS spouts typically don’t have a set screw on the underside, which is one way to tell what you have before you shop.

The standout feature is the auto-reset lift rod diverter. When you lift the rod, water goes to the showerhead; when the valve is shut off, Moen says the diverter automatically returns to the tub fill position. That means the next person who turns on the water gets the tub, not a surprise shower.

The listing gives unusually precise dimensions: a 5-1/2-inch spout length, a 1-1/8-inch spout opening and a 2-9/16-inch wall-side fitment size. Moen says the chrome finish resists tarnishing and corrosion, and the warranty field reads Limited Lifetime Warranty. To install, you unscrew the old spout counterclockwise, wrap the threads with sealing tape if the instructions call for it and screw the new one on until it is snug to the wall.

It suits homes with a threaded nipple at the wall, households with kids or guests, and anyone replacing an older Moen IPS spout with the same connection.

Why we like it

• Auto-reset diverter
• Clear dimensions in the listing
• Limited Lifetime Warranty

Watch out for

The listing doesn’t give a required nipple length, so compare the 2-9/16-inch wall-side fitment against your current spout before ordering.

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3. Prime-Line MP54510 Tub Spout with Diverter: Best Budget Threaded

Prime-Line’s MP54510 is a universal replacement tub spout with a shower diverter, made of zinc diecast with a chrome-plated finish. It has a 1/2-inch female iron pipe (FIP) fitting, which means it screws onto a threaded male 1/2-inch pipe, and it measures 5-1/4 inches long.

The listing is blunt about fit, and that’s helpful. It says the spout only fits a 1/2-inch diameter male threaded pipe, is not for copper pipe and includes no adapter. Prime-Line also asks buyers to measure the existing pipe before ordering. If your current spout has a set screw underneath, this is the wrong spout.

Day to day, it does the basic jobs: fills the tub and diverts water to the shower when you use the diverter. The listing doesn’t describe whether that diverter pulls up, pulls down or resets on its own, and the warranty field is empty, so treat warranty coverage as not stated. Zinc diecast is a common material for budget spouts, and the chrome plating gives the familiar bright finish.

It suits rental units, guest baths and quick fixes where a worn spout drips or no longer diverts properly, and where the pipe at the wall is threaded. Shut off the water before removing the old spout, and use thread sealing tape as the instructions direct.

Why we like it

• Low price
• Plain-spoken fit guidance
• Chrome-plated zinc body

Watch out for

It fits threaded 1/2-inch pipe only, includes no copper adapter, and the warranty field is blank.

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4. Danco 10315 Decorative Tub Spout, Pull-Up Diverter, 6 in: Best Universal-Fit Kit

Danco’s 10315 is a decorative chrome tub spout with a pull-up diverter, sold as a kit meant to fit most bathtub plumbing. The listing describes it as a way to replace an old, leaky spout while restoring full tub and shower functionality, with a 6-inch reach from the wall.

Fit is the whole point. Danco includes adapters for 2- to 3-inch-long 1/2-inch copper slip-on pipes, 1/2- to 3/4-inch-long 1/2-inch IPS stub-outs, and 3/4- to 1-inch-long 3/4-inch IPS stub-outs, and the spout screws directly onto 3-3/4- to 4-inch-long 1/2-inch IPS pipes with thread sealing tape. The box holds a thread adapter with a pre-installed screw, an NPT bushing, thread seal tape, a compression washer and an extension nipple.

Danco calls it a quick DIY project with basic tools. For slip-on copper pipes, you’ll need silicone grease, a Phillips screwdriver and sandpaper to get a leak-free seal; threaded IPS pipes need no extra tools, per the listing. The spout is zinc metal with plastic adapters, and Danco advises against harsh chemicals that could damage the finish.

It suits older homes, flips and rentals where the pipe behind the spout is a mystery or an odd length, and anyone who wants one box that covers several connection types.

Why we like it

• Covers copper and two IPS sizes
• Thread tape and extension nipple included
• 6-inch reach

Watch out for

Adapters are plastic, and the copper slip-on install calls for sanding and silicone grease to seal properly.

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5. Delta RP17453 Tub Spout, Pull-Down Diverter, Chrome: Best for Delta Tub Faucets

Delta’s RP17453 is a genuine Delta repair part: a 6-inch chrome tub spout with a pull-down diverter, designed to coordinate with the Delta Classic collection. Delta says it is designed exclusively for Delta faucets and rigorously tested for quality performance.

The connection is flexible on paper. The listing says it sweats onto 1/2-inch C.W.T. (copper water tube) or threads onto 1/2-inch IPS, and adds that the sweat connection should be 1/4 inch to 1 inch from the wall surface. Sweating means soldering, so that route is a job for someone comfortable with a torch or a plumber; threading onto IPS is the simpler DIY path.

In use, you pull the diverter down, rather than up, to send water to the showerhead. The listing says the spout is available in other finishes, and Delta lists a phone line, 1-800-345-DELTA, for technical assistance. The warranty field reads Lifetime Faucet and Finish Lifetime Limited Warranty.

It suits homeowners with a Delta tub and shower valve whose old spout leaks, won’t divert fully or has a worn finish, and who want the original part rather than a universal substitute. Confirm your connection type before ordering, shut off the water first, and keep a towel handy for the water left in the pipe.

Why we like it

• Genuine Delta part
• Sweat or IPS connection
• Delta support line listed

Watch out for

Delta says it is made for Delta faucets, and the copper option is soldered, not slip-on.

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6. Moen 3857BN Brantford Tub Diverter Spout, Brushed Nickel: Best Brushed Nickel

Moen’s 3857BN is the Brantford collection’s diverter tub spout in brushed nickel. Brantford is Moen’s traditional-style line, and this spout is designed to coordinate with Brantford tub and shower fixtures and traditional bathroom decor.

It is a slip-fit spout. Moen says it installs onto a straight 1/2-inch copper pipe with no threaded adapter on the pipe and secures in place with a set screw. The listing gives a tip for checking compatibility: existing slip-fit spouts can typically be identified by a set screw on the underside, near the wall. At about 7.25 inches long, the spout reaches a bit farther into the tub than a 5.5-inch spout would.

A pull-up diverter sends water from the tub spout to the showerhead. The brushed nickel finish is described as a warm metallic look that helps resist fingerprints, and Moen says the build is meant to give a reliable watertight fit that prevents leaks and drips. The warranty field reads Limited Lifetime Warranty.

It suits a bathroom where the valve trim, showerhead or faucet is already brushed nickel, especially Brantford, and where the tub needs a little extra reach. Mixing finishes is a style choice, but a matched spout makes the whole wall look intentional.

Why we like it

• Matches brushed nickel trim
• Extra-long reach
• Limited Lifetime Warranty

Watch out for

It needs a straight copper pipe with no threaded adapter, and it costs more than the chrome options.

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7. Delta RP73371BL Trinsic Tub Spout, Matte Black: Best Matte Black

Delta’s RP73371BL is the tub spout from the Trinsic collection in matte black. Trinsic is Delta’s modern line, and this spout is meant to coordinate with Trinsic bath fixtures sold separately, giving the tub wall a consistent black finish.

It slips onto a 1/2-inch C.W.T. copper pipe, and Delta includes its RP33794 adapter assembly in the box. The spout measures 6-1/8 inches in total length, and you pull the diverter up to send water to the showerhead. The listing describes durable non-metallic construction, which keeps weight down but is worth knowing if you expected solid metal.

The warranty field reads Lifetime Faucet and Finish Lifetime Limited Warranty, and the listing links to Delta’s return policy. As with any slip-on spout, the seal depends on a clean pipe and correct insertion depth, so follow Delta’s instructions and check for leaks at the wall after the first few uses.

It suits modern bathrooms with black hardware, Trinsic owners replacing a damaged spout, and remodels where the rest of the trim is already matte black. If your pipe is threaded, look for an IPS spout instead, and if you’d rather have a metal body, check the material line on any black spout before you order. Turn off the water supply before removing the old spout.

Why we like it

• Matte black finish
• Adapter assembly included
• Lifetime finish warranty field

Watch out for

The body is non-metallic, and it is the most expensive spout on this page.

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How We Chose the Best Bathtub Spouts

We compared each spout’s Amazon listing and specs, and quoted only what the listings say:

• Connection type: slip-fit copper (CC or CWT), threaded 1/2-inch IPS, or a universal kit with adapters.
• Diverter: pull-up, pull-down, auto-reset or none stated.
• Length and fit details: spout length, reach and any stub-out measurements the listing gives.
• Finish and collection: chrome, brushed nickel or matte black, and which faucet line it matches.
• Warranty and seller: the warranty field, and every pick sold by Amazon.com and in stock at the time of writing.

Bathtub Spout Buying Guide

Slip-Fit vs. Threaded: Check for a Set Screw

Look underneath your current spout near the wall. Moen’s listings explain that slip-fit spouts can typically be identified by a set screw there, while IPS spouts typically have no set screw and screw onto threads. Loosen the screw and the slip-fit spout pulls straight off; with no screw, turn the spout counterclockwise to unscrew it. The Moen 3931, Moen Brantford and Delta Trinsic are slip-fit, the Moen 3800 and Prime-Line are threaded, and the Danco kit and Delta RP17453 can go either way.

Measuring the Pipe Stub-Out

Once the old spout is off, measure how far the pipe extends from the finished wall and whether it is smooth copper or threaded. Stub-out length matters: the Danco kit lists adapters for 2- to 3-inch copper and short IPS nipples and screws directly onto 3-3/4- to 4-inch IPS, and Delta says its sweat connection sits 1/4 inch to 1 inch from the wall. Prime-Line simply says to measure your existing pipe before ordering. Take a photo of the pipe and the old spout before you shop.

Best Bathtub Spout Diverter Styles

Most tub-and-shower spouts have a diverter that blocks the spout and sends water to the showerhead. Pull-up lift rods are the most common style here (Moen 3931, Moen Brantford, Danco, Delta Trinsic). Delta’s RP17453 pulls down. Moen’s 3800 adds an auto-reset that returns to tub fill when the water is shut off. If the shower runs weakly while the spout still pours, a worn diverter is a likely cause, and on these one-piece spouts the fix is replacing the spout.

Matching Finishes and Brands

Replacement spouts are usually sold to match a brand’s trim: Moen Brantford in brushed nickel, Delta Trinsic in matte black, and Delta Classic in chrome. Pfister also sells replacement tub spouts for its own valves, so check your valve’s brand and collection before you buy. If you’re updating the sink at the same time, our bathroom faucet guide covers Moen, Delta, Pfister and Kohler faucets by hole spacing.

Bathtub Spout Covers: Hide It or Replace It?

Soft spout covers are sold to cushion the spout for small children at bath time, and decorative covers can hide a dated or scuffed spout. A cover doesn’t fix a drip, a weak diverter or a gap at the wall, though. If the spout leaks or no longer diverts, replace it; if it simply looks worn, a new spout in a matching finish is a lasting fix rather than a disguise. While you’re at the tub, our bathtub drain guide covers stoppers, hair catchers and drain kits.

Leaks Behind the Wall: Water Damage and Your Insurance

A tub spout looks harmless, but the pipe it covers runs into the wall. A loose slip-fit seal or a cracked threaded fitting can push water back into the wall cavity every time someone showers, and you may not see it until drywall or flooring is damaged.

• Shut the water off first. EPA’s Fix a Leak Week page reminds DIYers not to forget to turn off the water line before starting a fixture repair, and suggests an experienced handyperson or licensed plumber for more complicated shower valve leaks.
• Seal the wall gap. Where the instructions call for it, run a bead of kitchen-and-bath caulk where the spout meets the tile so shower water can’t run behind it. Our bathtub caulk guide compares silicone options.
• Fix drips fast. The same EPA page says a faucet dripping once per second can waste more than 3,000 gallons a year.
• Dry any leak quickly. The EPA’s guide to mold and moisture says to dry water-damaged areas and items within 24 to 48 hours to prevent mold growth, and to fix plumbing leaks as soon as possible.

Homeowners policies often treat sudden, accidental water damage differently from damage caused by a slow leak that went unnoticed. Our Ohio homeowners insurance guide and tips for first-time Ohio homeowners explain what to ask your agent.

Frequently Asked Questions

What is the best bathtub spout for most homes?

For a slip-fit copper pipe, the Moen 3931 is our overall pick: a 5.5-inch chrome spout with a 1/2-inch CC slip-fit connection, a lift rod diverter and a Limited Lifetime Warranty field. For threaded pipe, the Moen 3800 adds an auto-reset diverter.

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

Look under the spout near the wall. Moen’s listings say slip-fit spouts typically have a set screw there, and IPS threaded spouts typically don’t. Once the old spout is off, a smooth copper pipe means slip-fit and a threaded nipple means IPS.

What is the best bathtub spout diverter?

It depends on habit. Pull-up lift rods are the most common style, Delta’s RP17453 pulls down, and Moen’s 3800 resets to tub fill automatically when the water is shut off, which helps households where people forget to push the diverter back.

Is a bathtub spout cover a good fix for a leaking spout?

No. A cover can protect little heads or hide a worn finish, but it won’t stop a drip, fix a weak diverter or seal a gap at the wall. Replace the spout and caulk the wall joint if the instructions call for it.

Do I need a plumber to replace a tub spout?

Slip-fit and threaded spouts are common DIY swaps with basic tools: shut the water off, remove the old spout and install the new one per its instructions. A soldered (sweat) connection or a leaking valve behind the wall is a job for a licensed plumber.

The Bottom Line

For a slip-fit copper pipe, the Moen 3931 is the best bathtub spout for most homes: a simple 5.5-inch chrome replacement with a lift rod diverter and a lifetime warranty field. Threaded pipes call for the Moen 3800, with its auto-reset diverter, or the budget Prime-Line MP54510. The Danco 10315 kit covers mystery stub-outs, the Delta RP17453 is the genuine part for Delta Classic sets, and the Moen Brantford and Delta Trinsic spouts match brushed nickel and matte black trim. Check for that set screw, shut off the water and caulk the wall joint where the instructions call for it.

Wondering how your policy handles a leak behind the tub wall? Call Jeff Smith’s State Farm office at (740) 354-7747 or request a free coverage review.