If you have any concerns regarding the Gicar Flow Meter O-Ring features, abilities, or fit please contact consumer service here or pop into our live chat feature to your lower right. This item is eligible for a return within 30-days of the shipping date. To make a return contact us via the contact us page for an RMA#. If an RMA# is not present on the outside of the box, no credit will be issued. Full Shipping Policies & Full Returns & Refund Policy
This is the seal that goes between the flowmeter base and cap. It would fix a leak through the seam between the two parts. If a customer has to separate the parts, then the o-ring can sometimes break and require replacement as well.