Watts Water Technologies QCK-25 Ice Maker Kit by Watts Water Technologies. $20.62. 1 EACH. PEX ice maker installation kit. 25' x 1/4'' O.D. Pex tubing and shut off tee for ice makers and drinking water lines. For use with 1/2'' copper, PEX, CPVC, polybutylene, and 1/4'' O.D. PEX, polyethylene or copper supply lines for ice makers and water connections in refrigerators.. Save 13% Off!