PURPOSE – To properly install the Model 37HD1 & 37HD2 Backflow Preventer onto a standard hose thread outlet, carefully adhere to the instructions below.

PROCEDURE –

1. The bushing is factory assembled and preset and should not be further modified,, adjusted or removed.
2. Before attaching the Backflow Preventer, clean the faucet hose threads to remove any dirt, grease, loose paint or loose corrosion.
3. Open the tube of Loctite RC/680 adhesive by snapping at the neck. Use the tube to apply a bead of adhesive 360° around the faucet hose thread near the middle of the thread. See figure 1a.
4. Screw the Backflow Preventer assembly clockwise onto the hose thread outlet only until the faucet outlet thread are just covered, and no further. See figure 1b, 1c & 1d.
5. Wipe off any excess Loctite RC/680 adhesive. It is important that the Backflow Preventer is not disturbed and that the water is not turned on for at least 15 minutes. This will allow the Loctite adhesive to properly cure between the bushing and the faucet hose thread.

CRITERIA –

After 15 minutes, attach a hose and nozzle to the Backflow Preventer outlet. See figure 1e. Turn on the water and check for leaks. No leak indicates a proper installation.