Is this acceptable?
Does it matter? It's already done.
Air relief lines may, or may not, be significant depending on the pool, the piping, and the filter itself. If you start seeing fine bubbles in the pool . . . you may have some additional repairs to carry out. If not, you may be golden.
But . . . air relief lines on split shell filters can have an IMPORTANT safety function: split shells (DE, cartridge, OR sand) have severely injured people, when they were opened while still containing pressurized air. So, if you don't already have one, installing an air relief valve UNDER the pressure gauge
On many filters, you can 'make' one, with these bits from Amazon, and some Teflon tape:
ASME Safety Valve, set 60 psi, 1/4" Male NPT
Anderson Metals Brass Close Nipple, 1/4" NPT
Anderson Metals Brass Barstock Tee, 1/4"
Bookmarks