W3s180t 18 sand filter with 1-1/2 top mount multiport valve- limited saftron surface mount volleyball kit beige saftron pa-vb-kit-sm-b. Integral top diffuser ensures even distribution of water over the top of the sand media bed. The Hayward Pro Series high-rate sand filters incorporate the latest pool filter technology to ensure your in ground or above ground pool is operating at its very best.