Hotspring TRI-X FILTERS - 5 Pack Tri-X Filters by Watkins 73178

Watkins Tri-X Filter -- 5 (Five) Pack PN 73178

A complete set for HotSpring's Premier High Performance Spas

5-Pack of our Tri-X Filters. The Tri-X filter is 3-dimensional to more effectively filtrate by depth and surface, creating a longer time between cleaning cycles. Each Tri-X filter provides 65 square feet of filtration. Fits all HotSpring Spas. Watkins PN 73178 (PN stamped on filter 0969601)

This synthetic fiber cartridge filter was introduced in the 2004 Hot Spring high-performance spa models. In 2006 the Tri-X became available as a replacement for the common polyester filters (aka paper filters). The unique design enables it to filter twice the water per minute than a common filter. You don’t have to clean it as often either! This filter can replace the 71825 (paper) filter in all 1990-current Hot Spring spa models, 1998-2002 Hot Spot models and all Solana X, RX, SX & TX spa models.

Note: Dishwasher safe for intermittent rinsing (But DO NOT use soap. DO NOT use Heat Drying cycle). No more spraying off your filters outside in the dead of Winter! Though the dishwasher rinse is an intermittent cleaning method, we do recommend a deep filter cleaning using the FreshWater Filter Cleaning Granules can only provide.

Dimensions (each filter):

6" Diameter

10.5" Length

2" Hole



We ship within 2 business days (oftentimes same-day). When item closes over a weekend or holiday, we will ship the next business day. We ship via USPS Priority Mail and/or FedEx Ground. If you prefer faster shipping, please make comment in check out process, or call/email us. We will attempt to accommodate your request. Tracking is always provided to buyer.


If you DO NOT see an item that you NEED for your Watkins manufactured spa (HotSpring, Limelight, Tiger River, HotSpot, Solana) - please EMAIL US! We may just have it and we can provide you a quote. Please email us.


How to Find your Spa Serial Number?



If emailing or calling us about your spa, it is helpful to know your Spa’s Serial Number. Typically, your spa serial number decal will be inside the hot tub equipment compartment, attached to the spa shell wall. It will say the Manufacture Name (Watkins), the Model Name, and then a Serial Number. If you have any questions of how to locate the spa SN, or how to determine information of your spa by its SN, please email us.



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$355.00 USD