Pentek RO-2500 Installation And Operating Instructions Manual page 15

4 - REPLACING THE PRE-FILTER AND POST-FILTER
CARTRIDGES
CAUTION:
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7. Insert cartridges in the bottom of the housings. Make sure cartridge slips over standpipe in the bottom of
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the housing.
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NOTE: Be sure to install cartridges in proper housings (see previous diagram).
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8. Screw bottoms of housings back onto caps securely, do not over-tighten. Turn on cold water supply.
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Check for leaks. Continue to check periodically to make sure no leaks develop.
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4th Stage Post-Filter Cartridge: post-filter should be replaced every twelve months.
1. Turn off incoming water supply and valve on the storage tank. Place a tray under the system to catch any
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water that spills during removal of the filter housings.
2. Open faucet to release pressure.
3. Remove filter from bracket and discard.
4. Remove tubes from fittings by pressing in collar around the fitting while pulling the tubing out with your
other hand.
NOTE: If quick connect fittings need to be installed, tape threads of fittings with 3 wraps of Teflon® tape
and attach to filter.
CAUTION:
NOTE:
• The filter has an arrow on it showing the direction of flow. The tee fitting connects to the inlet side of the
filter and the elbow fitting attaches to the outlet side.
• Hand tighten fittings, then tighten with wrench 1/4 turn.
5. Attach 4th stage filter to bracket with the tee fitting on the right hand side.
6. Attach tubes to fittings by pushing in until the tube stops. Check to see if tube is in place by trying to gently
pull tube out.
The rubber O-ring provides the water-tight seal between the cap and the bottom of the housing.
It is important that the O-ring be properly seated in the groove below the threads of the housing
or a water leak could occur.
Ensure the tape is not touching O-ring on the fitting or a leak may occur.
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