(1) Nothing in this chapter shall be construed to require that a person obtain a license or a certified plumber in order to do plumbing work at his or her residence or farm or place of business or on other property owned by him or her.

     (2) A current certificate of competency or apprentice permit is not required for:

     (a) Persons performing plumbing work on a farm; or

     (b) Certified journeyman electricians, certified residential specialty electricians, or electrical trainees working for an electrical contractor and performing exempt work under RCW 18.27.090(18).

     (3) Nothing in this chapter shall be intended to derogate from or dispense with the requirements of any valid plumbing code enacted by a political subdivision of the state, except that no code shall require the holder of a certificate of competency to demonstrate any additional proof of competency or obtain any other license or pay any fee in order to engage in the trade of plumbing.

     (4) This chapter shall not apply to common carriers subject to Part I of the Interstate Commerce Act, nor to their officers and employees.

     (5) Nothing in this chapter shall be construed to apply to any farm, business, industrial plant, or corporation doing plumbing work on premises it owns or operates.

     (6) Nothing in this chapter shall be construed to restrict the right of any householder to assist or receive assistance from a friend, neighbor, relative or other person when none of the individuals doing such plumbing hold themselves out as engaged in the trade or business of plumbing.

[2003 c 399 § 402; 1973 1st ex.s. c 175 § 15.]

NOTES:

     Part headings not law -- 2003 c 399: See note following RCW 19.28.006.