Unicel C-7367 | 75 sq ft Dimension One Spa Filter
Excluded Brands
The following brands are not eligible for LTI discount codes (including WELCOME). They go on sale only during manufacturer-authorized promotions:
- Gozney — pizza ovens and accessories
- OHCO — massage chairs
- Positive Posture — massage chairs and recliners
- Nomadix — outdoor lifestyle products (towels, blankets, accessories)
Excluded Products
The following individual products are also not eligible for discount codes:
- Any product that already has a price markdown — items on sale or clearance can't stack additional discounts on top
- FreshWater Salt System Replacement Cartridge (single)
- FreshWater Salt System Replacement Cartridge (3 Pack)
- Route Protection Insurance — third-party shipping protection, not eligible for our discounts
- Bullfrog A / R / X Series 10-00282 Filter Cartridges
- Bullfrog STIL Series 10-00281 Filter Cartridges
- FROG® @ease Sanitizer System for Bullfrog Spas
- FROG® @ease Replacement Cartridge for Bullfrog Spas (3 Pack)
- Bullfrog Simplicity™ Flat Filters for M Series (4 Pack)
- Filter Core Cage & Cap Assembly for Bullfrog Spas
- Fireplaces (gas, wood-burning, and fireplace inserts)
- Electric Fireplaces
- Gas Vent Pipe
- Pellet Vent Pipe
- Fireplace Fronts
This list can change. Manufacturers occasionally add or remove products from their MAP-protected lists. We update this page when they do, but the most accurate way to confirm whether a discount applies to a specific item is to add the item to your cart and try the code at checkout. If the code doesn't work, the item is excluded. If it does work, it's eligible.
The Unicel C-7367 is a 75 square foot replacement cartridge for Dimension One Spas, replacing OEM part number 1561-00. It fits the housings Dimension One markets as the E-Z Lock system, and the name is earned: instead of dropping in, threading on, or pushing into a socket, this cartridge uses a twist lock. You seat it and rotate a partial turn, and it locks into place with a positive, unmistakable engagement.
That is a genuinely good design, and it solves a problem the other approaches leave open. A threaded cartridge can be cross-threaded. A slip fitting can sit half-inserted and feel installed while leaving a bypass gap. A drop-in can rock on a piece of grit. A twist lock either engages or it does not — the tabs are captured behind the lugs in the housing or they are not, and you can feel the difference. There is no ambiguous middle state where the cartridge seems fine and quietly lets water past.
It also means this cartridge cannot be pulled straight out. If you have owned any other kind of spa, your instinct at cleaning time will be to reach in and lift — and that instinct will snap the lock tabs. This one has to be rotated to release first. It is the single most important thing to know about the filter, and it takes two seconds once you know it.
Above the lock, the closed top carries molded Y stand-offs — the three-armed prongs Dimension One and Pleatco refer to as a "castle top," and the visual signature of D1 filters. They are structural, not decorative: they hold the cartridge at the correct height in the housing and preserve the flow clearance above it. Underneath, 215 pleats of 3 oz Reemay 2033 spunbonded polyester deliver the full 75 square feet, over a solid molded core with chemical-resistant end caps. Made in the USA by Meissner Manufacturing, with more than 45 years behind the Unicel name.
Pro Tip — twist before you lift. This is the one cartridge in the range that will break if you pull it straight up. Grip it, rotate it a partial turn to disengage the lock tabs, and only then lift it clear. If it will not turn easily, do not force it — check that you are turning the right way and that no debris has jammed the mechanism. Snapped lock tabs mean a new cartridge at best, and a damaged housing fitting at worst. The same applies in reverse when installing: seat it fully first, then twist to lock. Twisting while it is still riding high just grinds the tabs against the lugs.
UNICEL®
UNICEL® Brand FAQs
Who makes Unicel filters?
Unicel filters are made byMeissner Mfg. Co., Inc., a family business that began as a small contract sewing operation in thelate 1950sand moved into pool filtration through the 1970s. By the end of that decade the company was producing cartridge filters for the industry'soriginal equipment manufacturers, and in1985it introduced the Unicel brand as aftermarket replacements. It's still owned and operated by the Meissner family today.
Are Unicel filters as good as the original manufacturer's filter?
Unicel builds its cartridges tomeet or exceed original equipment specifications— and that's a meaningful distinction here, because the company produced cartridges for the industry's OEMs before it ever launched its own brand. Unicel cartridges usedurable, chemical-resistant end capswith an exact fit,high-capacity media,uniform pleatsfor optimal flow, and asolid corethat resists collapsing under pressure.
Where are Unicel filters made?
Unicel filters are manufactured inCalifornia, with components sourcedexclusively in the United States. The line comprisesnearly 500 products, covering replacement cartridges, D.E. grids, filter discs, and related parts.
How do I find the right Unicel filter for my spa?
Unicel cartridges areinterchangeable with all major filter brands, and each one cross-references to a list of original equipment part numbers. The most reliable method is topull your current cartridge and read the part number printed on it, then match it to the Unicel cross-reference. If the number has worn off,measure your old cartridge— diameter, length, and the size and style of the openings at each end — and match those instead. Also confirmhow many cartridgesyour spa uses.
How long does a Unicel filter last?
Cartridge life depends on how heavily the spa is used, yourwater chemistry, and how consistently you clean the filter. Many Unicel cartridges useReemay® polyester media, whosetrilobal fibersprovide considerably more surface area than standard rounded fibers — which increases dirt-holding capacity and extends the time between cleanings. With regular rinsing and periodic deep cleaning, a well-maintained cartridge commonly serves a year or more.
When should I replace my filter instead of cleaning it?
Replace the cartridge when thecycle between cleanings becomes noticeably shorter, when you seelow water flowor high differential pressure, when the media has atear, or if thecenter core collapses. Pleats that stay permanently flattened or discolored after a proper cleaning are another sign the cartridge has reached the end of its service life.
About UNICEL®
Unicel is the nation's leading manufacturer of replacement filter cartridges for pools and spas — and the story behind it is a genuinely American one. In the late 1950s, Richard T. Meissner started a small part-time contract sewing operation. Through the 1970s, Meissner Mfg. Co., Inc. moved into swimming pool filter bags, then D.E. grid element covering, and by the end of that decade the company was producing cartridge filters for the industry's original equipment manufacturers.
That's the detail that matters most: Unicel was building the filters that went into new spas long before it sold a replacement. In 1985, the company introduced the UNICEL brand so dealers and technicians could source elements built to O.E.M. specifications from a single place — even for equipment brands they didn't carry. Today the line spans nearly 500 products, all manufactured in California with components sourced exclusively in the USA.
By staying focused on one thing — filtration — Unicel has built deep expertise in a critical corner of the industry, from media development to cartridge design. Every cartridge is built with chemical-resistant end caps for an exact fit, high-capacity filter media, uniform pleats for optimal flow, and a solid core that holds its shape under pressure. Meissner Mfg. Co., Inc. remains owned and operated by the Meissner family, still recognized for quality and service. American-made products, world-class service.
