You cannot breathe directly out of a scuba tank because of the high pressure. A regulator reduces pressure to safe a level that can be inhaled by the diver. A diving regulator has two parts: the First Stage reduces the tank pressure and connects it to the Second Stage which contains the mouthpiece for breathing
Repeatedly rated as the best in its class, the SP-5 exceeds both Navy Class A and European CE standards. The SP-5 may have been the first regulator you ever used due to its widespread use in rental and resort operations. The SP-5 is a Non-Balanced Flow-By Piston Designed Regulator. This simple yet Fail-Safe Design will deliver air even if there is a first stage failure. Made of Marine Grade Chromed Brass for Durability and Long Life, the SP-5 First Stage has 4 LP Ports and 1 HP Port with 3/8" and 7/16" threads. Regulator weighs 26 oz (737.1 g) and can be used with air or nitrox mixtures up to 40 percent right out of the box. Regulator is covered by a 24 month limited warranty.
Simple, Dependable and Economical
Non-Balanced Flow-By Piston Fail-Safe Design
Outperform other High-End Regulators
Exceeds both Navy Class A and European CE Standards