I installed a donaldson filter on the wife's RZR. She does not go through deep water, and we have routed her fresh air intake back to the original spot, but what do you do with the little plastic cap on the lid? That is the only part that would be temporarily be under water. Are there temporary water proof caps? She will never submerge the whole canister, but I worry about the little rubber lips on the lid. Thanks for your help.