4-Gallon White Steel Bladder Tank with 1/4″ NPT connection. This tank is made by PA E and is NSF Certified. RO-152-W can be used as a replacement part, upgrade, or additional tank for any Reverse Osmosis System. NOTE: Add 1-1/2" vertical clearance for valve. John Guest Reverse Osmosis Tank Valves can be found below in Add Ons/Accessories. Water Pressure Water Capacity Water Pressure Water Capacity 15 PSIG 1.48 gal 40 PSIG 3.36 gal 20 PSIG 2.09 gal 45 PSIG 3.50 gal 25 PSIG 2.53 gal 50 PSIG 3.64 gal 30 PSIG 2.85 gal 55 PSIG 3.76 gal 35 PSIG 3.07 gal 60 PSIG 3.88 gal
