Ostra Plumbing Supplies Home ›› Local Listings ›› NSW ›› Seven Hills ›› Ostra Plumbing Supplies NSW Automotive Seven Hills, NSW 2147 Robert Bristow(029) 624-1000https://ostra.com.au Ostra Plumbing Supplies is welcoming you. We specialise in Plumbing Supplies in Sydney’s region. From blocked drains, toilet repairs to even replacing a tap washer we provide all Bathroom Supplies, Bathroom Renovation Supplies at very affordable prices.