How do I measure my Master Spas hot tub cover?

Measure the outside cabinet edge to outside cabinet edge — not the inside lip or waterline. Measure both dimensions. Most Master Spas hot tubs use square covers: 78" (6.5 ft), 84" (7 ft), or 94" (8 ft). H2X swim spas use rectangular covers. Also confirm the skirt length — Master Spas covers default to a 4-inch skirt that wraps over the cabinet edge.

What size cover fits my Master Spas hot tub?

Common Master Spas cover sizes: 78"x78" (SKU X454108-1) fits Twilight TS 6.1/6.2 and Healthy Living HL 620L/624L/630L. 84"x84" (SKU X454777) fits Clarity CLS 730/738, Healthy Living HL 7/7.5/740L, and most 7-foot Master Spas models. 94"x94" (8x8, SKU X454888) fits Twilight TS 8.1/8.2/8.3, Clarity CLS 855/855L, Healthy Living HL 8/8.5, and 40+ Down East, Legend, and Michael Phelps models. H2X swim spas use rectangular covers ranging from 7x8 ft to 10x8 ft.

How often should I replace my Master Spas hot tub cover?

Replace your Master Spas cover when it feels heavy or waterlogged (saturated foam loses its R-value), when vinyl shows tears or UV cracking, when the foam core is compressed or broken at the center fold, or when the heat-seal at the fold line has degraded. Typical lifespan is 5–7 years for residential use. High-UV climates or heavy use may reduce this to 3–5 years.

Are Master Spas hot tub covers returnable?

No. Master Spas hot tub covers are custom made-to-order and are non-returnable. Allow 8–12 weeks for production and delivery. Measure carefully before ordering. If your cover arrives damaged, note the damage on all delivery receipts before signing and contact MHTP at 855-656-7727 immediately.

What is the difference between a square cover and a corner-cut cover?

Both the square and corner-cut versions share the same outer dimension (78"x78" for standard models). The corner-cut cover has angled corners to match Master Spas cabinet designs with cut corners. If your spa has square corners, order the standard square cover (X454108-1). If your spa has angled corner cuts, order the corner-cut version (X120240). Check your spa model or call MHTP at 855-656-7727 if unsure.

Part Finder

Category: Hot Tub Covers

Find Your Filter by Series

How to Measure Your Master Spas Cover

Covers are made-to-order and non-returnable — measure accurately before ordering.

Measure the outside cabinet edge to outside cabinet edge of your spa (not the inside lip or waterline).
Measure both dimensions. Most Master Spas hot tubs use square covers: 78", 84", or 94" (8×8). H2X swim spas are rectangular.
Confirm the fold orientation — rectangular swim spa covers fold across the shorter dimension.
Confirm skirt length — Master Spas covers default to a 4-inch skirt that wraps over the cabinet edge.

Master Spas Cover Size Guide

78"×78" — Square (SKU: X454108-1) — Twilight TS 6.1, TS 6.2 (2009–2024); Healthy Living HL 620L, HL 624L, HL 630L
78"×78" — Corner Cut (SKU: X120240) — Same 78" outer dimension with angled corners; fits corner-cabinet Master Spas designs
84"×84" (7×7) (SKU: X454777) — Clarity CLS 730/738 (L); Healthy Living HL 7, HL 7.5, HL 740L; Contractor Series CS 738–743; Down East Cape Cod/Exeter (2009–2012)
94"×94" (8×8) (SKU: X454888) — Twilight TS 8.1/8.2/8.3; Clarity CLS 855/855L, Precision 8, Balance 8; Healthy Living HL 8, HL 8.5; Down East Westbrook/Windsor/Portsmouth (2000–2012) — see full fitment list
7′×8′ swim spa (SKU: X458494) — H2X swim spa (select models)
9′×8′ swim spa (SKU: X454994) — H2X swim spa (select models)
10′×8′ swim spa (SKU: X454108) — H2X Trainer 10 swim spa

Not sure of your model? Check the label on the equipment door or call MHTP at 855-656-7727.

When to Replace Your Master Spas Cover

Cover feels heavy or waterlogged — the foam core has absorbed water and lost its R-value
Visible tears, cracks, or UV-damaged vinyl
Foam core is compressed, deformed, or broken at the center fold
Heat-loss seal at the fold line has degraded
Mold or mildew inside the vapor barrier
Age: 5–7 years typical for residential use; high-UV climates or heavy use may reduce this to 3–5 years

All covers are made-to-order. Allow 8–12 weeks for production and delivery. Free domestic shipping via FedEx freight — a valid phone number and signature are required at delivery. Inspect the cover before signing; note any damage on the receipt before accepting and call 855-656-7727. Covers are non-returnable special-order items. Financing available through PayPal Pay Later — select PayPal Credit at checkout.