Okla. Admin. Code § 380:25-5-33

Current through Vol. 42, No. 6, December 2, 2024

Section 380:25-5-33 - Provisions for thermal expansion in hot water systems

(a) Each water heating system shall be provided with thermal expansion protection. Provisions for thermal expansion shall be in accordance with the applicable Codes and these rules.

(b) Expansion tanks for use in hot water heating systems shall be consistent with the volume and capacity of the system. If the system is designed to operate at 30 psi or less, the tank shall be suitably designed for a minimum hydrostatic test pressure of 75 psi. Expansion tanks for systems designed to operate above 30 psi shall be constructed in accordance with ASME Code Section VIII Division I, or ASME Code Section X.

(c) The minimum capacity of the closed type expansion tank may be determined using the chart in Appendix A.

Okla. Admin. Code § 380:25-5-33

Added at 19 Ok Reg 2788, eff 11-1-02