Deep model at 45.75 inches tall for an extra-deep soak. 55" long by 31" wide by 45.75" high, 85-gallon soak.
| Model | Hydro Dimensions 3155D |
|---|---|
| Series | HD Specialty Series |
| Length | 55" |
| Width | 31" |
| Height | 45.75" |
| Operating capacity | 85 gallons |
| Door | Inward-swinging door |
| Shell | Gel-coat fiberglass |
| Origin | Temecula, California, USA |
| Warranty | Lifetime warranty on shell, frame, finish, door seal, motors and controls |
Every Hydro Dimensions tub arrives as a complete soaker: low step-in entry door, built-in contoured seat, angled interior grab bar, chrome Roman faucet with a 5-foot handheld shower wand, drain kit and overflow, and a textured non-slip floor. Oil-rubbed bronze and brushed nickel faucet finishes are available for an additional charge.
Build your 3155D: choose therapy, drag jets where you want them and get a spec sheet →
Straight from the factory drawing, every dimension exactly as published: top view, side and end elevations, drain and water line, door swing and extension panels. Tap to expand and zoom.
Contractors: measure the rough opening, drain location and door swing clearance off this sheet.
The 3155D is 55 inches long and 31 inches wide. Measure the alcove length, width and the narrowest doorway on the path to the bathroom, then send us the numbers. Extension panels close the gap in a standard 60-inch alcove, and we confirm fit before you order.
The tub stands 45.75 inches high and holds about 85 gallons, so water reaches the chest of a seated bather rather than the waist. If you have a 40-gallon water heater, ask us about fill times.
No. Hydro and air systems are plumbed into the shell at the factory, so choose your therapy package when you order. Heated seat, chromatherapy and aromatherapy are chosen at the same time.
No. We ship supply-only anywhere in the U.S. and Canada (free shipping to the lower 48 on many models, freight quoted for Canada) and you keep the factory warranty when the tub is installed to specification, and it holds when you install it yourself, with a 1-year labor warranty on self-installs. Or our factory-certified installers handle everything, usually in one day.
Many of the traditional walk in tubs may be somewhat shallow for some bathers. It can be frustrating taking a bath and not be able to get the upper back and shoulders in the water. For this reason, we carry extra deep soaker walk in baths that make it possible for larger bathers to get down into the water. It feels good to be able to submerge your entire body in water. With the deep walk in tub products, bathers can more easily cover their body with water when taking a bath. Are you tall? Deep walk in tubs might be the best solution for you.
The deep walk in tubs we offer can come with a full hydrotherapy jetting system. This tub boasts 20 air hydrotherapy jets and 5 whirlpool hydro massage jets. Imagine being able to take a hydrotherapy bath anytime you want! The effervescent effect of the air jets can be invigorating and rejuvenating. Hydrotherapy may be something that can benefit you. It has been used as a homeopathic treatment for a very long time from cultures all over the world. Aches and joint pains may feel a little better after taking a hydrotherapy bath. It is important to consult with your doctor to make sure a hydrotherapy bathtub is right for you.
3155 Schematics Side View
When people shop for a deep walk in tub, they often assume a bigger exterior automatically means a deeper soak.
In reality, that is rarely true.
What truly matters is the usable soaking depth, measured from the seat level to the overflow.
Many standard walk in tubs only provide about 13 inches of usable soaking depth. For some bathers, that means the water never reaches the shoulders. This can make a bath feel underwhelming and uncomfortable.
HD Series 3155-D
Industry Standard Soaking Depth is around 13"
This 31" x 55" has 22" of soaking depth making it perfect for taller bathers who want extra space.
This model delivers a true extra deep walk in tub experience with 22 inches of soaking depth while maintaining a compact footprint — a rare combination confirmed in the manufacturer schematics
That additional depth changes how the bath feels from the moment you sit down. Your upper back and shoulders are more likely to be submerged. As a result, your body stays warmer and more relaxed.
One common concern is space. Many homeowners worry that a deep soak walk in bath will require a large bathroom. However, the HD Series 3155-D is designed to balance depth with efficiency.
According to the installation schematics, this unit provides generous interior depth while keeping a manageable overall footprint and door clearance. That makes it a strong option for walk in tubs for large people who do not want a full remodel.
Hydrotherapy works best when water can surround more of your body.
In a shallow tub, jets may only reach limited areas.
In a deep soak walk in bath, the water line sits higher.
This allows air and whirlpool jets to engage the back, hips, and shoulders more effectively.
The Cleveland Clinic notes that warm water immersion and hydrotherapy can promote relaxation
and temporary relief from muscle tension when used appropriately.
You can read more here:
Cleveland Clinic hydrotherapy overview.
Deeper tubs may use more warm water. Before installation, confirm your water heater capacity. This simple step helps ensure your extra deep walk in tub performs exactly as expected from day one.
If shallow soaking has left you disappointed, this is a meaningful upgrade.
A true deep walk in tub can restore comfort, confidence, and enjoyment to bathing.
Call toll free 1-888-779-BATH (2284) for a fast price quote,
or request a call back here.
Drop shipping is available to all 50 states and Canada.
Installation is available in select areas.
