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D25F Troubleshooting - Part 2
Step 8: Place the check valve seal with the groove facing upward
into the new barb.
Step 9: Thread it onto the white stem and hand-tighten.
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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 7: To reassemble, press the new check valve assembly into
the stem as far as it will go.