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600,000 BTU Titanium Tube and Shell* Opposite Side Ports* GPM Boiler Side 17.44* GPM Pool Side 114.16* Boiler Ports 2" NPT* Pool Ports 21/2" NPT*Port to Port-25 3/8"* Diameter 4 3/8"* Length 33 1/2"* Number of Tubes - 42* PSI Drop Hot 1.22* PSI Drop Cold 3.07* Working Pressure - 80 PSI* BTU rated with 180F Boiler and 80F PoolThis unit is suitable for pools/spas that are 51,600 gallons.These heat exchangers are constructed with a Titanium shell and Titanium corrugated inner tubes to ensure high velocities inside the unit.This is a very reliable, efficient and cost effective way to transfer heat indirectly between any boiler circuit and any pool or spa circuit.The units are designed for both horizontal and vertical mounting. Port sizes: (to/from Boiler) 2" - (to/from Pool) 2 1/2".It is recommended to always install the unit with the mounting bracket (mounting brackets included with each unit) fixed to a wall, and/or ceiling or floor to prevent water hammer or vibrations which could damage the unit.IMPORTANT!!Always install the Titanium Pool & Spa Heat Exchanger in a counter flow pattern.The units should be installed downstream of the filtration and pumping equipment. The boiler water must be assisted and the usual precaustions taken to prevent air locks.The pool water pump should be controlled by a thermostat in the pool pipe work before the heat exchanger and set at the required temperature.Titanium Pool and Spa Heat Exchangers are suited for a large range of chemical environments and conditions, due to a thin, invisible, but extremely protective surface oxide film (primarily TiO2).Titanium is especially known for its elevated resistance to localized attack and stress corrosion in aqueous chlorides (e.g., brines, seawater) and other halides and wet halogens (e.g., wet CI2 or CI2 sat, brines), and to hot, highly oxidizing, acidic solutions (e.g., FeCI3 and nitric acid solutions). Titanium is also recognized for its superior resistance to erosion, erosion-corrosion, cavitations and impingement in flowing, turbulent fluids.Note:1. For occasional (holidays & weekends) use pools we recommend a 2x output multiplier to obtain a 2F/hr heat up rate;2.