Water & Wastewater
Certified isolation and control valves for potable water, treatment plants and wastewater networks: gate, butterfly, knife gate and check valves built for corrosion resistance and clog-free service.
Water and wastewater systems run continuously and span the cleanest to the dirtiest media a network handles, from potable distribution mains to raw sewage, sludge and treatment chemicals. The valves have to isolate reliably for maintenance, resist corrosion in constant wet service, and shrug off the solids that block lesser designs.
Purple Valves supplies the gate, butterfly, knife gate and check valves that isolate and control treatment plants and pipeline networks, with potable-water certification on clean service and abrasion- and clog-resistant designs on the sludge and wastewater side.
Common Challenges in Water & Wastewater
Solids, sludge and clogging
Wastewater carries grit, rag and sludge that jam conventional valves. Knife gate, plug and full-bore designs cut through and pass solids without packing the seat or blocking the line.
Constant corrosion exposure
Permanent wet service and treatment chemicals attack standard materials. Coated bodies, resilient seats and corrosion-resistant trim keep valves sealing reliably for decades.
Potable water safety
Drinking water valves must not contaminate supply. NSF 61 and WaterMark certified materials, with AWWA-compliant design, ensure components are safe for potable contact.
Recommended Valve Types
Resilient-Seated Gate Valves
Full-bore, drop-tight isolation on potable and raw water mains to AWWA standards, with epoxy-coated bodies for long buried service life.
View 12 products
Butterfly Valves
Compact, economical isolation and throttling on large treatment and distribution mains, with resilient liners for tight shut-off.
View 25 productsKnife Gate Valves
A sharp gate shears through sludge and solids-laden flows for reliable isolation on treatment plant service.
Ask us about availability
Check Valves
Swing, dual-plate and silent check valves prevent backflow on pump discharge and outfall lines.
View 80 products
Waterworks & Specialist Valves
Purpose-built valves for network duty: backflow prevention, hydrants, mud valves, water hammer removers and level control.
View 16 products
Air Valves
Air release, vacuum and combination air valves protect pipelines from air pockets and vacuum collapse during filling and draining.
View 7 productsApplications, Materials & Standards
Key Applications
- Potable water distribution and trunk mains
- Treatment plant isolation and process control
- Sedimentation, clarifier and sludge basins
- Raw sewage and effluent pumping stations
- Sludge, slurry and biosolids handling
- Backflow prevention and outfall protection
Typical Materials
- Ductile iron with fusion-bonded epoxy coating
- EPDM resilient seats for drop-tight shut-off
- Stainless and bronze trim for corrosion resistance
- Abrasion-resistant linings for sludge and grit
Standards & Certifications
- AWWA C509 / C515 gate valves
- AWWA C504 butterfly valves
- NSF / ANSI 61 potable water certification
- WaterMark certification (AS/NZS)
Specifying valves for water & wastewater?
Tell us your size, pressure class and service conditions and our team will recommend the right valve for the duty, with pricing and availability.