Home / Water Tanks / Water Tanks - Accessories / Water Fillers, Filling Accessories & Access Caps Product Description INSPECTION, FILLING AND ACCESS CAPS For the simplest system an underseat tank can be filled through the hatch for ease of installation. The standard Hatch we use is the THSO4. This comes with an O ring seal and can be fitted to the top of almost any tank. THSO4 CANNOT be fitted to the side or bottom of tanks. SUPPLIED WITH 6 STAINLESS STEEL FIXING SCREWS Specifications Brand C.A.K. Tanks Condition New Product Code THSO4+6SCREWS Weight 0.25kg Customer reviews No reviews left yet Write A Review Sort byMost RecentTop Rated Description INSPECTION, FILLING AND ACCESS CAPS For the simplest system an underseat tank can be filled through the hatch for ease of installation. The standard Hatch we use is the THSO4. This comes with an O ring seal and can be fitted to the top of almost any tank. THSO4 CANNOT be fitted to the side or bottom of tanks. SUPPLIED WITH 6 STAINLESS STEEL FIXING SCREWS Reviews No reviews left yet Write A Review Sort byMost RecentTop Rated Attributes Brand C.A.K. Tanks Condition New Product Code THSO4+6SCREWS Weight 0.25kg Delivery & Returns Customer Reviews 4" INSP HATCH THREADED + 'O' RING Product Code THSO4+6SCREWS THSO4+6SCREWS £14.96 Login to add this product to your wishlist.