- Allows the installer to flush the hot and cold lines simultaneously without risk of cross flow
- Can be left in valve under pressure until cartridge is installed
- Ships standard with all GrohSafe 3.0 Rough-in valves
- For use with GrohSafe 3.0 Rough-in Valve (35 110, 35 111, 35 112, 35 113, 35 114, 35 115, 35 116)
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