Trevi A953957NU11 Temperature Adjustment Carrier Handle compatible with various Trevi thermostatic shower valves including Serenis, New Haven, Alchemy, Sandringham, Ascari, Boost, CTV, Kurve, Outline, Sottini, Therm, Traditional, and Trevioline models. This handle adapter is commonly used with the Trevi S960134NU thermostatic cartridge and may be paired with the grey plastic extender Trevi A963649NU MK2. Suitable for use with concealed or exposed thermostatic shower valves with bottom or standard connections. Designed for post-1997 models including TT, MK II, and built-in or exposed configurations. Frequently used with shower enclosures such as Serenis 180 Alcove and Silver face plate assemblies. Frequently Asked Questions: Question: Is this compatible with the A6290AA shower? Answer: Yes, the A953957NU11 is compatible with the A6290AA shower valve. Question: I have an A3000 shower and am having difficulty installing the temperature adjustment carrier. Answer: Ensure the front handle carrier is turned fully anti-clockwise before installing the A953957NU11. This part is a genuine replacement component for use in thermostatic shower systems. Also compatible with selected dual and single control built-in thermostatic valves. Refer to manufacturer specifications for proper fitment. Available spare parts include shower door seals, seal kits, shower valve handles, and thermostatic cartridges.