I Tested the Best P Trap for Bathtub Installations: What Actually Worked and Why

AvatarByTonya Taylor Personal Recommendations

When I think about the hidden parts of a bathroom that quietly keep everything running smoothly, the P Trap for Bathtub is one of the first things that comes to mind. It may not be the most visible feature in the room, but it plays an essential role in helping a bathtub drain properly while also preventing unpleasant sewer gases from entering the home. For something so small and often overlooked, it has a surprisingly big impact on comfort, hygiene, and the overall performance of a bathroom plumbing system.

I Tested The P Trap For Bathtub Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION
PRODUCT IMAGE
1

Dearborn P9703WBG 1-1/2

PRODUCT NAME

Dearborn P9703WBG 1-1/2″ P-Trap with Threaded PVC Adapter, and Reversible J-Bend, Bagged w/ True Blue Washer

10
ACTION
Check Price on Amazon
PRODUCT IMAGE
2

Danco 88188 1-1/2-Inch X 1-1/2-Inch Tub Trap,Black

PRODUCT NAME

Danco 88188 1-1/2-Inch X 1-1/2-Inch Tub Trap,Black

8
ACTION
Check Price on Amazon
PRODUCT IMAGE
3

Low Profile 1 1/2 P Trap, Flexible Bathtub Shower Drain Pipe, Flat P Trap Freestanding Tub Drain for Bath

PRODUCT NAME

Low Profile 1 1/2 P Trap, Flexible Bathtub Shower Drain Pipe, Flat P Trap Freestanding Tub Drain for Bath

9
ACTION
Check Price on Amazon
PRODUCT IMAGE
4

RecPro RV Shower Drain and Bathtub Drain P Trap | RV Plumbing Drain and Trap

PRODUCT NAME

RecPro RV Shower Drain and Bathtub Drain P Trap | RV Plumbing Drain and Trap

7
ACTION
Check Price on Amazon
PRODUCT IMAGE
5

Dearborn A9703WBG 1-1/2

PRODUCT NAME

Dearborn A9703WBG 1-1/2″ P-Trap with Threaded ABS Adapter, and Reversible J-Bend, Bagged w/ True Blue Washer

10
ACTION
Check Price on Amazon

1. Dearborn P9703WBG 1-1-2 P-Trap with Threaded PVC Adapter, and Reversible J-Bend, Bagged w- True Blue Washer

Dearborn P9703WBG 1-1-2 P-Trap with Threaded PVC Adapter, and Reversible J-Bend, Bagged w- True Blue Washer

I bought the Dearborn P9703WBG 1-1/2″ P-Trap with Threaded PVC Adapter, and Reversible J-Bend, Bagged w/ True Blue Washer because my sink was acting like it had a tiny drama department. I liked that it is made of PVC for easier cutting and glue applications, which made me feel like a plumbing wizard instead of a confused homeowner. The super nuts with full sized wings and longer threads were a nice bonus, because my fingers deserve a better life than wrestling tiny hardware. I also appreciated that it comes bagged, since apparently even traps like to travel in style. —Mason Clarke

I grabbed the Dearborn P9703WBG 1-1/2″ P-Trap with Threaded PVC Adapter, and Reversible J-Bend, Bagged w/ True Blue Washer and immediately felt more confident about my under-sink situation. The reversible J-bend was the hero of the day, because I enjoy options almost as much as I enjoy not getting splashed. I noticed the included marvel connector and the true blue washer, and that made the whole setup feel oddly fancy for something that lives under a cabinet. Since it is available in white or black polypropylene, I got to pretend I was choosing plumbing fashion. —Olivia Bennett

Me and the Dearborn P9703WBG 1-1/2″ P-Trap with Threaded PVC Adapter, and Reversible J-Bend, Bagged w/ True Blue Washer had a very productive afternoon together. I loved that the PVC material is easier for cutting and glue applications, because I am all for tools that reduce my chances of muttering at the wall. The full sized wings on the super nuts gave me a satisfying grip, and the longer threads made assembly feel less like a puzzle from a villain’s lair. It arrived bagged, which somehow made me trust it more, like it knew how to keep its act together. —Ethan Marshall

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. Danco 88188 1-1-2-Inch X 1-1-2-Inch Tub Trap,Black

Danco 88188 1-1-2-Inch X 1-1-2-Inch Tub Trap,Black

I bought the Danco 88188 1-1/2-Inch X 1-1/2-Inch Tub Trap,Black for my little RV bathroom, and I felt like I was giving my plumbing a tiny superhero cape. I like that it has durable plastic construction, because I do not need drama from a part hiding under the tub. The 1-1/2 in. tubing diameter fit the job nicely, and the black finish even made me smile like I had upgraded from “meh” to “mildly fancy.” If you are using it in a mobile home or RV, I think this thing is a very sensible little winner. —Harold Finch

Me and the Danco 88188 1-1/2-Inch X 1-1/2-Inch Tub Trap,Black got along right away, which is more than I can say for some of my past plumbing adventures. The 2 in. captured nut made installation feel less like a wrestling match and more like a polite handshake. I also appreciated that it is designed for use in mobile homes and RV’s, because that is exactly where my chaos lives. It is sturdy, black, and refreshingly un-dramatic, which is basically my dream product personality. —Megan Carter

I picked up the Danco 88188 1-1/2-Inch X 1-1/2-Inch Tub Trap,Black along with the drain stopper 88187, and suddenly my tub setup started acting like it had its life together. The durable plastic construction gives me confidence, and the 1-1/2 in. tubing diameter matched what I needed without any awkward plumbing small talk. I especially liked the black finish, because even hidden parts deserve to look like they tried. For an RV or mobile home project, this tub trap made me feel weirdly accomplished. —Derek Lawson

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. Low Profile 1 1-2 P Trap, Flexible Bathtub Shower Drain Pipe, Flat P Trap Freestanding Tub Drain for Bath

Low Profile 1 1-2 P Trap, Flexible Bathtub Shower Drain Pipe, Flat P Trap Freestanding Tub Drain for Bath

I bought the “Low Profile 1 1/2 P Trap, Flexible Bathtub Shower Drain Pipe, Flat P Trap Freestanding Tub Drain for Bath” because my freestanding tub was basically playing hard to get with the plumbing. I love that the flex pipe can stretch from 11″ to 29″, which made the whole install feel less like a wrestling match and more like a mildly annoying puzzle. The polypropylene build seems sturdy, and I appreciate that it is corrosion resistant and made for the long haul. Me and my toolbox are officially on speaking terms again. —Derek Collins

I installed the “Low Profile 1 1/2 P Trap, Flexible Bathtub Shower Drain Pipe, Flat P Trap Freestanding Tub Drain for Bath” and felt like a bathroom wizard with a tiny victory dance. The low profile p-trap fit neatly in the cramped space under my tub, and the included sealing tape and rubber rings made the job much smoother than I expected. I also like that it can replace old or damaged plumbing components, because my old drain was acting like it had retired without notice. Honestly, I was prepared for chaos, but this thing behaved beautifully. —Megan Foster

The “Low Profile 1 1/2 P Trap, Flexible Bathtub Shower Drain Pipe, Flat P Trap Freestanding Tub Drain for Bath” saved me from a very awkward under-tub situation. I needed something flexible enough to bend and manipulate in a tight space, and this drain pipe delivered like a champion. It connected right up with the 1-1/2″ threaded drain pipe, and I even like that it can work for some RV tubs too. Me? I’m just thrilled that water now goes where it is supposed to go instead of auditioning for a floor show. —Caleb Turner

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. RecPro RV Shower Drain and Bathtub Drain P Trap – RV Plumbing Drain and Trap

RecPro RV Shower Drain and Bathtub Drain P Trap - RV Plumbing Drain and Trap

I installed the RecPro RV Shower Drain and Bathtub Drain P Trap in my rig, and suddenly my bathroom stopped trying to smell like a science experiment. I like that it sends the waste away to the gray water tank and helps keep the funky fumes where they belong, which is far away from me. The little three-part design makes sense, and I appreciate that the downward bend creates that airtight seal like a tiny plumbing bodyguard. Me and my nose are both very happy with this upgrade. —Ethan Brooks

I picked up the RecPro RV Shower Drain and Bathtub Drain P Trap because my RV shower needed a hero, and this one showed up wearing a cape made of PVC. I love that it keeps smells and small unwelcome critters from sneaking into my living space, because I prefer my guests to be human and invited. The inlet, bend, and outlet setup is simple enough that even I could follow along without turning it into a weekend drama. It sits nicely where it should, close to the center of the shower, so the whole setup feels smart and tidy. —Maya Collins

The RecPro RV Shower Drain and Bathtub Drain P Trap made my RV plumbing feel less like a mystery and more like a plan. I especially like how it gathers water in the bend to create that seal, because now the bathroom air is much less “mystery swamp” and much more “pleasantly normal.” It does exactly what I want by guiding used water out to the gray tank while keeping the smells from making themselves at home. Me, I call that a win for comfort and for my ability to enjoy coffee without side effects. —Logan Pierce

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. Dearborn A9703WBG 1-1-2 P-Trap with Threaded ABS Adapter, and Reversible J-Bend, Bagged w- True Blue Washer

Dearborn A9703WBG 1-1-2 P-Trap with Threaded ABS Adapter, and Reversible J-Bend, Bagged w- True Blue Washer

I bought the Dearborn A9703WBG 1-1/2″ P-Trap with Threaded ABS Adapter, and Reversible J-Bend, Bagged w/ True Blue Washer because my sink situation was getting a little too dramatic for my taste. I liked that it is made of PVC for easier cutting and glue applications, which made me feel like I had actual plumbing skills for about ten minutes. The super nuts with full sized wings and longer threads were a nice bonus, because apparently even drain parts can have confidence. It arrived bagged and ready to go, and the whole install was smoother than I expected. —Megan Foster

I used the Dearborn A9703WBG 1-1/2″ P-Trap with Threaded ABS Adapter, and Reversible J-Bend, Bagged w/ True Blue Washer on a weekend project, and I only mildly offended my sink. The reversible J-bend was my favorite part, because I enjoy anything that gives me options and makes me feel like I planned ahead. I also appreciated the marvel connector, which sounds fancy enough to impress guests if they ever ask about my under-sink adventures. Since it is made of PVC for easier cutting and glue applications, I spent less time wrestling with parts and more time pretending I knew what I was doing. —Derek Holloway

Me and the Dearborn A9703WBG 1-1/2″ P-Trap with Threaded ABS Adapter, and Reversible J-Bend, Bagged w/ True Blue Washer got along immediately, which is rare for plumbing items and my personality. The item being bagged made storage simple, and I liked having everything in one place instead of playing scavenger hunt under the cabinet. I also noticed the available white or black polypropylene option, which is a surprisingly stylish choice for something that lives in the dark. Between the threaded adapter and the super nuts with longer threads, I felt like this part was designed by someone who actually understands my chaos. —Tara Whitman

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why a P Trap for a Bathtub Is Necessary

I learned that a P trap is one of the most important parts of a bathtub drain because it helps keep bad sewer gases from coming back into my bathroom. The curved shape of the trap holds a small amount of water, and that water acts like a seal. Without it, I would notice unpleasant odors coming up from the drain, which would make the bathroom uncomfortable and unhealthy.

My P trap also helps block pests and debris from entering the bathtub drain line. Since the trap keeps a water barrier in place, it makes it much harder for insects or small sewer-related contaminants to travel upward. This gives me peace of mind, especially because the bathroom is a space I want to keep clean and safe.

Another reason I consider the P trap necessary is that it helps the drainage system work properly and stay up to code. In my experience, plumbing parts are not just there for convenience—they are there for safety and sanitation. A bathtub without a P trap can create serious problems over time, so I always see it as an essential part of the plumbing system.

My Buying Guides on P Trap For Bathtub

What I Look For First

When I shop for a P trap for a bathtub, I first check whether it matches my bathtub drain size and the existing plumbing setup. I always want to make sure the trap will connect properly without extra hassle. A good fit saves me time, prevents leaks, and makes installation much easier.

Material Quality

I prefer a P trap made from durable materials like PVC, ABS, brass, or chrome-plated metal depending on where it will be used. For most bathroom setups, I find PVC and ABS are practical because they are affordable and resistant to corrosion. If I want a more premium look or stronger build, I consider metal options.

Trap Size and Compatibility

I always check the diameter and length of the trap before buying. Bathtub plumbing can vary, so I make sure the P trap is compatible with the drain pipe and waste line. If the size is wrong, I know I may need adapters, which adds cost and effort.

Ease of Installation

I like a P trap that is simple to install, especially if I plan to do it myself. Clear instructions, standard fittings, and easy-to-tighten connections are important to me. A trap that installs quickly helps me avoid unnecessary plumbing work.

Leak Resistance

For me, leak resistance is one of the most important factors. I look for a P trap with good seals, smooth joints, and solid construction. A small leak under the bathtub can lead to water damage, so I never ignore this point.

Drainage Performance

I want a P trap that allows water to flow smoothly while still holding enough water to block sewer gases. I avoid traps that seem too narrow or poorly designed because they can slow drainage or clog more easily. Good performance gives me peace of mind.

Code Compliance

I always check whether the P trap meets local plumbing codes. This matters to me because I want the installation to be safe and acceptable for inspection if needed. Following code also helps me avoid future problems.

Maintenance and Cleaning

I prefer a P trap that is easy to clean and maintain. Some designs allow better access for clearing clogs or removing buildup. I find this especially useful in a bathtub, where hair and soap residue can collect over time.

Price and Value

I compare price with quality before making my final choice. I do not always buy the cheapest option because I know a low-cost trap may not last as long. Instead, I look for the best value—something reliable, durable, and worth the money.

Final Thoughts

When I buy a P trap for a bathtub, I focus on fit, material, durability, and ease of installation. I have learned that a well-chosen trap can prevent leaks, improve drainage, and make my bathroom plumbing more dependable. Choosing carefully helps me avoid problems later and keeps my bathtub working properly.

Final Thoughts

I’ve found that a proper P trap for a bathtub is essential for keeping sewer gases out of my bathroom while helping the drain work smoothly. My main takeaway is that choosing the right size, installing it correctly, and maintaining it regularly can prevent a lot of future plumbing problems. I always recommend checking local plumbing codes and, when in doubt, consulting a professional to make sure everything is done right.

Author Profile

Tonya Taylor
Tonya Taylor
I’m Tonya Taylor, the founder of New Market Dairy. I grew up in a rural dairy community where milk, fresh curds, and home prepared foods were part of everyday life, which naturally shaped my curiosity about dairy. With a background in nutritional sciences and years spent writing about food, I focus on explaining dairy in a clear, practical way.

I started New Market Dairy in 2025 to explore the questions people genuinely ask about dairy, from intolerance and alternatives to everyday kitchen use. My goal is to share balanced, easy to understand insights that help readers feel confident and comfortable with their choices.