The purchase adds four Phoenix-area locations to the Rooter Hero brand.

Boasting combined revenue of more than $8.5 billion, 138 members and 1,450 locations across the continental United States, this new group will become, by revenue, the largest plumbing group in the country.

The acquisition includes all Water-Right subsidiaries, real estate and sister company Mineral-Right. 

The sale is expected to close in the first half of 2019 and is subject to approval by U.S. competition authorities under the Hart Scott Rodino Act.

Both transactions are subject to customary post-closing adjustments.