Watts' LockDown Fastener is designed specifically for under
floor PEX applications. Its loose hold allows PEX to move
during expansion and contraction of the tubing. The
LockDown won't pop open like other similar clips you may
have seen or tried. Use LockDowns for attaching 3/8" or
1/2" PEX; do not use it for 5/8" PEX as it will fit too tightly.
Order five LockDowns for 10' of PEX. Follow all Installation
Part Number: P667100-100