【NOTE】Always measure the minimum diameter at the bottom of the filter before purchase, A measurement of 5.55±0.08 inches confirms proper fit. YIHANGYE Strap Wrench Handle 8 Inches, Steel Handle Adjustable Strap Wrench for Replacing Water Filter, PVC Pipe Joints, Oil Filter, Swimming Pool... This durable wrench for water filter housing is specifically designed for 4.5x10 and 4.5x20 standard filter housings (Note: 4.5x10 and 4.5x20 refers to the internal cartridges size, not the size of the housing). Due to dimensional variations in Big Blue filter housings across manufacturers, wrench compatibility issues may occur. If it is approximately 5.55 inches , the wrench will fit. Close the inlet valve and press the pressure valve on the filter cap to release the internal pressure. Fits big blue housings Compatibility: Designed for Big Blue-style filter housings with 4.5 diameter cartridges (4.5×10 or 4.5×20) . White Small Wrench: Compatibility: Fits 2.5 diameter housings (2.5×10 or 2.5×20), commonly used in undersink or reverse osmosis units . Purchase: Search ASIN: B0DYMPFN65.Still unable to open? First, make sure the wrench is turning in the clockwise direction. Wait for 12 hours before trying to open it again. You can measure the smallest diameter at the base of the filter housing. Please confirm the dimensions! KODIAK247625 High Performance VI-Pro Variable Solid Carbide Index End Mill, USA Made, 4 , Alcro-Max Coated, .030 Corner , 1/2 Shank, 1-1/4 Length of Cut, 3 Overall Length 【Durable Material】Made of PP material, the wrench features excellent anti-aging properties, able to resist wear, breakage, and deformation for a long time, making it sturdy and durable Water Filter Wrench for Whole House Filter - Replaces SW-3 - Heavy Duty 【Product Dimensions】The wrench has a maximum inner diameter of 6.38 inches, the inner diameter between the teeth is 5.79 inches, and the thickness is 0.77 inches Big Blue Filter Wrench Calvana 2 Water Filter Wrenches With 6 Durable O-Rings, Compatible Wih APEC Water System Ensuring Seamless Replacement And Reliable Filtration Basin Wrench
