Leslie’s Poolmart Inc., the largest pool supply chain in the United States, is for sale.

The Phoenix-based retailer’s private-equity owners Leonard Green & Partners are reportedly asking for more than $1 billion for Leslie’s, which has 640 stores in 35 states.

Interested buyers include Bain Capital, Madison Dearborn Partners and TPG. Goldman Sachs will manage the sales process.

Leslie’s sales hit $510 million for the fiscal year ending last October, and sources say the firm has about $250 million in debt.