【Fitment】Perfectly fit for Triton II and Triton C-3 pool and spa sand filter models: TR100, TR140, TR100C, TR140C, TR100C-3, TR140C-3. Compatible with Triton II TR100 & TR140 manufactured after 10-01-01, Triton II Commercial TR100C & TR140C, Triton C-3 Commercial sand filters manufactured before March 1997. Direct replacement for 154856. 【Feature】Direct replacement for the original part to solve the leaking problem and ensure long-term filter efficiency. The PSI gauge clearly indicates when the filter needs cleaning, and the special lid wrench in the kit, helps you easily remove and install the top. 【Superior Material】This black buttress thread closure kit is made of high quality materials with black coated for rust and corrosion resistance, performing stable and reliable in harsh environments. Built to last, it features good sealing, no deformation and abrasion resistance. 【Easy Installation】This kit comes with air relief valve, PSI gauge, air safety valve lock nut, lid, O-ring, and lid wrench. Assemble the pressure gauge and bleeder valve to the closure lid and lubricate the O-ring with silicone grease. Place the closure lid on the filter and make sure the threads are aligned properly to avoid cross-threading. Then use the wrench included to hand tight + 1/4 turn, making certain the air vent is up inside the dome of the closure. 【Satisfaction Guarantee】If you're not satisfied with the product, simply return it for a refund in 30 days. We support 30-day refund for return and 12-month warranty. Fits for models TR100, TR140, TR100C, TR140C, TR100C-3, TR140C-3. Compatible with Triton II TR100 & TR140 manufactured after 10-01-01, Triton II Commercial TR100C & TR140C, Triton C-3 Commercial sand filters manufactured before March 1997.