Pool heater bypass systems and methods

A pool water heating system comprising:

• a pool water heater comprising:
• a pool water heater input port configured to receive a portion of pool water,
• a heating system configured to heat water received by the pool water heater input port, and
• a pool water heater output port configured to output heated water from the heating system, wherein the pool water heater comprises metal;
• and
• a bypass system comprising:
• a pool water receiving port configured to receive water from a pool,
• a bypass line configured to divert a portion of the water from the pool,
• an output port configured to output a second portion of the water from the pool to the pool water heater input port of the heating system,
• a pool water heater receiving port configured to receive the heated water from pool water heater output port,
• a sacrificial anode in fluid communication with the pool water receiving port, the output port, and the bypass line, wherein the sacrificial anode is disposed in a vertically aligned position relative to the bypass line, and
• a pool output port configured to output, to the pool, a combination of the heated water from the heating system and the diverted portion of the water from the pool.

A method of heating comprising:

• receiving, via a pool water receiving port of a bypass system, water from a pool;
• outputting, via an output port of the bypass system, a first portion of pool water from the pool;
• receiving, from the output port of the bypass system and via a pool water heater input port of a pool water heater, the first portion of pool water;
• heating, via a heating system of the pool water heater, the portion of water received by the pool water heater input port to generate heated water;
• outputting, via a pool water heater output port of the pool water heater, heated water from the heating system,
• diverting, via a bypass line of the bypass system, a second portion of water from the pool, wherein the second portion of water flows in contact with a sacrificial anode of the bypass system;
• receiving, from a pool water output port of the pool water heater and via a pool water heater receiving port of the bypass system, the heated water;
• and
• outputting, from a pool output port of the bypass system and to the pool, a combination of the heated water and the second portion of pool water of the water from the pool.