Tier1 Replacement for Dream Maker Spa filter, Pleatco PDM25 Spa Filter Cartridge AFFORDABLE REPLACEMENT: Replacement filter for Dream Maker Spa for 25 sq ft Dream Maker Spas and any systems that need 4 7/10 inch (Outside diameter) by 8 1/8 inch (Length) filters. INCREDIBLY SIMPLE TO USE: Easily replace your old PDM25 filter with the Tier1 Dream Maker filter EXTREMELY DURABLE: Durable and Washable Pleated fabric that maintains strength even when loaded with sediment, our high flow core is designed to support the filter while providing industry leading flow rates while causing less wear and tear on your pump. SPA FILTER CARTRIDGE REPLACEMENT: This Tier1 PDM25 Spa filter can be used in place of your PDM25 Pleatco filter. MULTI-PURPOSE: Multipurpose filter, bottom hole is interchangeable between a 1-1/2 threaded MPT and a 1-7/8 keyed fit It is time to clean or replace your filter cartridge when the pressure gauge on your filter tank reaches 8 psi above the pressure recorded when a new cartridge has been installed. It is also time to clean or replace your filter cartridge if there is a noticeable decrease in the pressure coming from your return jets. Turn the power off to your pump and bleed the excess air pressure of the system using the air valve on the filter. Remove any band clamps and/or lids to your filter. Remove the cartridge from the filter canister and dislodge any loose debris by directing a stream of water from a garden hose between each pleat. Do not use a high pressure car wash wand or a stiff brush to clean your cartridge. These abrasive methods may damage the filter media and snap the bands. Apply a spray on filter cleaner to the cartridge or grid to remove any oils or other organics. If stubborn stains persist, soak the cartridge overnight in a solution of TSP (trisodium phosphate). Rinse the cartridge thoroughly with clean fresh water and return it to the filter tank. Secure the tank lid and any band clamps. Restart your filtration system per manufacturers instructions.