Filter top cap cracked when removing the filter?Updated 16 days ago
Short answer
This can happen and, good news, does not affect filtration or safety. The cap/handle at the top of the cartridge is a non‑sealing, cosmetic/handling piece. The actual water seal is made by the O‑ring(s) and the filter’s core, which remain intact even if the top cap cracks.
Why this can happen (and why it’s okay)
Tight fit by design: Our filters are designed to fit snugly in the Modtub housing so water can’t bypass the media. Over time, temperature and pressure changes can make the first twist a little tighter than usual.
Non‑sealing cap/handle: The small plastic cap/handle on top of the filter helps with alignment and removal, but it does not hold water pressure. If it cracks, the filter’s performance is unaffected.
Sacrificial breakaway: On some cartridges, the cap is designed to be a breakaway feature that gives before the core or housing do—protecting the parts that actually matter for filtration.
If the filter core and O‑rings are intact (they almost always are), your water quality and flow will be the same.
What to do next (quick check)
Turn off water to the housing.
Open the housing and remove the filter.
Inspect the seal area:
Make sure the O‑ring(s) on the filter and/or housing are present, clean, and undamaged.
Confirm the filter core (the main cylindrical body) is intact. A cracked top cap/handle is okay.
Clean & re‑lube: Wipe the O‑ring(s) and apply a food‑grade silicone lubricant (a pea‑size amount) to help with smooth removal next time.
Reinstall or replace the filter following the arrows/keys in the housing. Hand‑tighten—no tools—until snug. Do not overtighten.
Turn water back on and check for leaks. None? You’re good to go.
Tips to prevent stiff removals
Hand‑tight only. Over‑tightening can make the next removal harder without improving the seal.
Use silicone lube on O‑rings during each change.
Relieve pressure before twisting off: shut water off and open a downstream tap for a few seconds.
Keep it clean: Grit on threads or O‑rings can increase friction.