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Watkins Manufacturing Hot Tub Spa Filters

Watkins Manufacturing, based in Vista, California, makes Hot Spring, Caldera and Freeflow hot tubs. Shop filters compatible with Watkins Manufacturing made by SpiroPure. SpiroPure cartridges are designed to fit those spas in a range of sizes and models, in some instances at 30–50% less than the originals. Find yours by part number or size, then order with free shipping over $99. Our support team is available seven days a week. Not sure which cartridge you need? Use our cross-reference chart or filter finder, or browse our swimming pool filters.
SpiroPure SP-PS-0014 Made in USA

Filbur FC-0014, Pleatco PWK70B

List Price: $86.96

Our Price: $43.48

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6-3/8” x 14”

Filbur FC-3915
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Watkins WA30TC-3 Compatible Filter

List Price: $34.85

Our Price: $17.43

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6" x 10-1/2"

Filbur FC-3960
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  • (15)

Watkins 31114 Compatible Filter

List Price: $83.44

Our Price: $41.72

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8-1/2" x 10-1/2"

FAQs on Watkins Manufacturing Hot Tub Spa

How do I know which Watkins Manufacturing filter fits my spa?

Start with the part number on your current cartridge, or the model number on your filter housing, and enter it in the AllFilters cross-reference chart. No number? Measure diameter, length and openings. SpiroPure Watkins-compatible cartridges are matched to those specs, so you can confirm fit before ordering.
Three sizes cover many Watkins spas: 6" x 10 1/2", 8 1/2" x 10 1/2" and 6 3/8" x 14". Spa models vary, so confirm your dimensions or part number first. The AllFilters cross-reference chart lists each SpiroPure Watkins-compatible option by size.
Turn off power, then rinse between the pleats with a garden hose every two to four weeks, and use an approved cartridge cleaner about every three months. Skip pressure washers. Heavy use calls for more frequent cleaning. A spare cartridge lets you swap one in while the other dries.
Yes. A compatible cartridge listed for your Watkins part number or spa model typically works the same way if its dimensions and end-cap style match. SpiroPure Watkins-compatible filters use pleated polyester media and a polypropylene core, and they cost as much as 30–50% less than the originals.
Spa cartridges can last 3–12 months with proper use, regular cleaning and well-maintained water. Heavy use shortens that. (Larger pool filters typically last longer.) While durable, these filters are meant to be replaced eventually. Replace sooner if the media tears or you accidentally crack an end cap from a drop when you remove the filter to rinse it. We recommend having an extra filter on hand during peak season. The support team can help you find your replacement.

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