T & T Hardware Replacement Mixer Cap Compatible with Kohler GP77886

Give your shower valve a new lease on life without replacing the entire assembly. The Replacement Mixer Cap compatible with Kohler GP77886 is engineered to match the original Coralais pressure-balance valve design precisely. Over time the mixer cap inside older style Coralais valves can wear, causing leaks, rough handle operation, or temperature instability. This genuine-spec part features the correct square stem design to match Coralais trim fittings, along with a durable brass stem for smoother, longer-lasting operation. Installation is straightforward and cost-effective: turn off the water supply, remove the handle and escutcheon, extract the old mixer cap, install the new unit oriented correctly, then reassemble. The result: restored handle control, balanced hot/cold performance, and eliminated dripping or inconsistent flow—without needing to dig in and replace the entire valve body. Whether you’re a homeowner tackling a DIY fix or a professional servicing rental properties or multi-unit buildings, this is the repair part you need to get the job done quickly and reliably.