The 7 best master spas hot tubs of 2025

FIBER-TECH BEAM CONSTRUCTION – Innovative Fiber-Tech Technology offers superior structural stability while maintaining a comfortable surface for a luxorious and refreshing spa experience

THE ULTIMATE SPA EXPERIENCE – Control all Spa functions from your phone or tablet; program Spa use and maintenance remotely with WIFI connectivity; available on App Store and Google Play App

REMOVABLE WIRELESS CONTROL PANEL – The Greystone Deluxe PureSpa includes a removable wireless control panel that features integrated wireless charging; 48 hours of operation on a single charge and conveniently attaches to top of the tub

PREMIUM ACCESSORIES – Everything you need for pure relaxation! Let your worries bubble away with 2 contoured headrests, an energy efficient spa cover, and a mood-setting multi-colored LED light (requires 3 AAA batteries, not included)

BUILT-IN FASTFILL INFLATION SYSTEM – Designed with a convenient FastFill inflation system; just simply inflate and deflate at a touch of a button, no external hose needed; interior dimensions measure 74 x 28 in

BENEFITS: Destroys organic contaminants to maintain clean, clear, sanitized water

USE: Specifically formulated for spa and hot tubs

COMPATIBILITY: Chlorine sanitizing systems

FEATURES: Quick dissolving, EPA approved formula, helps control algae growth, maintains water clean, clear, and sanitized

ACTIVE INGREDIENTS: Sodium Dichloro-s-Triazinetrione Dihydrate

BUILT FOR HEAVY LOADS + HARSH WINTERS: With its high-density foam, our hot tub cover protector is built to withstand heavy loads and harsh winters while keeping debris out of the water and lowering your running costs. Plus, its four lockable tie downs provide added safety and peace of mind for your family.

ZERO WASTE ABSORPTION TECHNOLOGY: Our spa covers for hot tub are designed with Zero water absorption technology, which wraps all foam to prevent waterlogging; unlike other manufactured spa covers that can become waterlogged and lose their effectiveness.

REDUCE YOUR ENERGY BILL: Our cleverly designed hot tub enclosures pay for themselves in energy savings alone! With an insulation value of R19 and made from quality high-density foam and marine-grade vinyl, our lightweight hot tub enclosure is designed to lock in the heat and keep out the cold, while allowing rain, ice, and snow to run off.

SAFETY FIRST: All our spa covers meet or exceed industry safety standards including foam density, handles, and straps with a locking feature.

BEST MATERIALS AND QUALITY: Only the best materials are used in our manufacturing process to provide the best product possible for all outdoor and indoor hot tub covers, satisfaction guaranteed!

#1 ORIGINAL + BEST HOT TUB COVER: Over 30,000 happy customers every year choose The Cover Guy as the best spa cover to reduce energy bills and eliminate waterlogging. The superior craftsmanship and design of our insulated hot tub cover comes from over 30 years of manufacturing experience.

3-YEAR WARRANTY: We are confident you'll be over the moon with your new durable and lightweight hot tub replacement cover. But to give you extra peace of mind, it comes with a 3-year Warranty.

FITS LIKE A GLOVE: Each cover is custom-made to fit the dimensions you provide. Please note that there is a tolerance of +/- 0.5" in the final size of the cover.

Perfect Match: Compatible with Master Spa X268548-PMA-R3, Waterway 817-4035, Teleweir 35 SF, Replace for pleatco PWW35L, Unicel 4CH-935, FC-0170, SD-01235, PDY35P3, PDC580-AFS, PAS-1613, PAS-1612, PWW35L-M, etc. All manufacturers' names and part numbers are used for compatibility reference

NSF/ANSI 50 Certified: Tested and certified by NSF International against NSF/ANSI 50 for the use of safe materials. The trilobal pleated design captures 3x more debris than regular fabric, efficiently trapping leaves, hair, sand, and oils for cleaner water

Dimension: With an outer diameter of 5", bottom of 2", and a length of 8 1/2", PWW35L spa filter cartridge can be easily installed in your filter without worrying about leaks or compatibility issues

Extremely Enduring: 4CH-935 hot tub filter replacement features spunbond polyester and a strong inner core, making it capable of withstanding high-pressure water flow and enduring enough to be a worthwhile investment for your hot tub

Economical Hot Tub Maintenance: Regularly cleaning and reusing the filter cartridge is a simple way to minimize water usage. We recommend cleaning the cartridge monthly to maximize its effectiveness and ensure a clean soaking experience

The updated model features denser foam for enhanced comfort and durability, offering a comfortable fit for adults and various hot tub pillow headrest . Hot tub supplies, including replacement spa pillow, chemicals, and accessories, are crucial for maintaining a clean, comfortable, and relaxing hot tub environment.

Made from high-density and durable material, these replacement spa pillows are perfect replica of Artesian spa parts and can handle exposure to various sanitizers used in modern hot tubs, and should be replaced every 3-4 years to restore your tub's look and feel.

Replacement Generic pillow for spa headrest . Spa headrest hot tub pads are essential accessories for outdoor hot tubs, specifically designed to fit 2009-2014 Master Spas hot tub models.

Guaranteed compatibility and quality ensure that the hot tub headrest replacement will fit perfectly and provide the same level of comfort and support as the original headrest.

Hot tub supplies, including replacement spa pillows, chemicals, and accessories, are essential for maintaining your hot tub and ensuring a clean and comfortable environment.

Master Spa Hot Tub Pillow

X540765

Clarity Spas

Clarity Spas Genesys Pillow

Spa Diverter Valve Handle Knob, Cap, Stem and O-Rings for Some Master Spas

4" Edge to Edge

2" Wide

Some Down East Hot Tubs 1999, 2000, 2001, 2002, 2003

Square hole is 7/16" Wide