Laundry Garden Hose adapter for Reverse Osmosis for 3/8" OD flexible reverse osmosis tubing RO garden/hose adapter 3/4" thread x 3/8" OD tubing Allow to use garden/laundry outlet for feeding Reverse Osmosis or other water filters Please do not USE any teflon tape, otherwise leak will guaranteed. This happens with many customers who make this mistake Rubber ring inside garden hose adapter prevents any leaks