On a commercial plant room you're rarely buying one flanged valve. You need isolation either side of the pump, a check on the discharge, a strainer ahead of the PRV, and maybe a balancing valve.
The headaches are always the same. Flanges drilled to the wrong table. One valve from one brand that doesn't match the next. Or a 150mm valve that turns out not to be WaterMarked when the rest of the line is.
Zetco's new flanged range gives you a matched set in 316 stainless, drilled to Table E or ANSI 150, plus bronze with flanges drilled to order. Here's how to put a package together without the re-order.
Table E or ANSI 150? Match the Other Flange
Most of the stainless range comes in two drillings:
- AS 2129 Table E: standard for most Australian flanged pipework, fittings and locally made equipment
- ANSI B16.5 Class 150: common on imported pumps, chillers, burners and packaged plant
The rule is simple: match whatever you're bolting to. Plant rooms often need both, with Table E on the pipework and ANSI on the imported pump set. Check every connection on the schedule before you order.
Our stainless press flange adaptor guide covers the same choice from the pipe side.
The 316 Stainless Set
Isolation: ball or gate
- 2-piece flanged ball valve, lockable: Table E (4480), 15–200mm, or ANSI 150 (4481), 20–200mm. 2000 kPa, quarter-turn.
- Flanged gate valve, bolted bonnet: Table E (4620) or ANSI 150 (4621), 25–200mm. Zetco lists 2500 kPa @ 37°C.
Ball valves are quicker to operate and lockable. Gate valves give you a full bore and suit valves that stay open for years. See gate vs ball.
Non-return
- Flanged swing check: Table E (4640) or ANSI 150 (4641), 25–200mm
Strainer
- Flanged Y strainer, 316 mesh: Table E (4650) or ANSI 150 (4651), 50–200mm. Listed WaterMarked to AS 3688.
Regulating
- Flanged globe valve, ANSI 150 (4631), 15–200mm, with screw and yoke. More in our globe valve guide.
Watch the WaterMark Size Cut-Off
This is the one that catches people. Per Zetco's listings:
- Flanged ball valves (4480/4481): WaterMarked to AS 5830.1, except the 200mm
- Flanged gate valves (4620/4621): WaterMarked 25–100mm only. 125–200mm are not.
- Flanged globe (4631): WaterMarked 15–100mm only. 125–200mm are not.
- Flanged swing checks (4640/4641) and Y strainers (4650/4651): listed WaterMarked across the range
On a potable service at 125mm and up, check every valve on the schedule against its listing before you order. Don't assume the whole series is covered.
Recycled Water: Lilac Handles
For recycled and non-drinking water services, the flanged ball valve comes with a lilac lockable handle: Table E (4484) or ANSI 150 (4485), 15–150mm.
The colour makes the service obvious to the next trade. For smaller lines, see lilac press ball valves.
Bronze, Flanges Drilled to Order
Where the spec calls for bronze, or the drilling is non-standard, Zetco's bronze flanged range is drilled to the AS 2129 table you specify:
- Gate valve (1710), 15–125mm, WaterMarked AS 1628, 1600 kPa
- Swing check (1808), 50–100mm, WaterMarked
- Y strainer (1525), 65–100mm, WaterMarked AS 3688
Confirm the drilling table when you order. Drilled-to-order means exactly that.
The Wafer Alternative
The cast iron wafer ball valve (6010) clamps between PN16 flanges. It gives you quarter-turn isolation in a very short face-to-face length, 20–100mm.
It's handy on irrigation, fire and industrial water lines where space is tight. It's not WaterMarked, so keep it off AS/NZS 3500 work.
The Short Version
Pick Table E or ANSI 150 by what you're bolting to, then build the set from one matched range. On potable lines, check the WaterMark listing size by size from 125mm up.
Browse everything in Zetco and all valves, with check valves in check valves. Trade account holders can send PSA a plant room schedule for a package quote.
Frequently Asked Questions
What's the difference between Table E and ANSI 150 flanges?
They're different drilling patterns. AS 2129 Table E is standard on most Australian pipework. ANSI B16.5 Class 150 is common on imported pumps and plant. Match the flange you're bolting to.
Are Zetco flanged stainless valves WaterMarked in every size?
No. Per Zetco, the 200mm flanged ball valve, and the 125–200mm flanged gate and globe valves, are not WaterMarked. Check each size on potable services.
What are lilac-handled valves for?
Lilac identifies recycled and non-drinking water services. Zetco's 4484 and 4485 flanged ball valves have lilac lockable handles.
What does flanges drilled to order mean?
The bronze flanged valves are drilled to the AS 2129 table you specify. Confirm the drilling when you order.