/A PATROL Expansion Tanks Hydroponic RX MODELS: RADIANT EXTROL® HEATING SYSTEM EXPANSION TANKS, 7-YEAR WARRANTY | J Shipping Shipping Standard List Model Part Volume Acceptance Dimensions (In) Wright ure Lead time Price Number Description Number (Gal) Volume(Ge) L WH (Lhe) 542031 (Days) (USD) = mas THE MOUNTING 30051 0 39150 RX-30 INLINE MOUNTING 380647 413307 10 $112.