Introduced in 1993 specifically for the pool and spa industry, this pressure switch is designed with a 2-1/2 lb differential to completely eliminate oscillating or chattering relays. This uses a plastic pan material and is for use with gas millivolt heaters. Available as 1/8 npt version or a 1/8" barb fitting. 3/16" or 1/4" tubing adapters sold separately. Electrical rating 1-25 amps at 24-240 VAC