Brass Serto were still relatively expensive, but a more tolerable $17 per tee. Noticed they do nickel plated too, which is probably a better option.
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I undertook some mods on my Giotto recently, coffee parts sells the nickel plated BSP fittings and the braze on olives (pipe ends). But I had to buy 4mm and 6mm copper pipe on eBay from a UK seller as nobody in Australia sells 4mm or 6mm copper pipe (1/4" is not the same).. You can then do away with the Teflon fittings.
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Here's a Fluid-O-Tech reciprocating pump arrangement that's hard plumbed out and 6mm Nylon return from OPV to pump inlet.
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Looks a bit newer than my BZ99s
Any idea what kind of fittings those are?
Interestingly, the Serto website mentions that the nickel plated fittings are not suitible for use with potable water. They do recommend the ultra low lead brass fittings (basically the standard fittings with the lead leached out post manufacture), but sadly these are not available from the local distributor (and have a minimum order of 100). Standard fittings are made from CW617N (pickled), which is < 2.2% lead.
I discovered yesterday that the distributor has some super cheap dry pressure gauges ($15 ea), 0-12 barg. So this project is growing in scope...
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This is the primary hydraulic line in a C.M.A (Wega Mini-Nova EVD). 1/4" BSB single flares and a brass insert into the 6mm Nylon return tube from the OPV to a PTFE "t" to the inlet to the pump (sort of a self-prime idea I guess).
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- Dec 13
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Senior Member
- Dec 13
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- Brisbane
- Bulk brew; Pour over; Double Ristretto; Oat Milk Cappuccino or Piccolo
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I'll try to discover what that insert is (don't work on many prosumer machines with PTFE and Nylon until lately).
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I slapped a dry pressure gauge on my BZ99s too - more because I didn't have a cap for a unused junction outlet, but it's been handy. Gives me 4 barg when idle, so either it and/or my 350 kPa regulator are/is slightly out. About 10 barg when extracting.Originally posted by MrJack View PostLooks a bit newer than my BZ99s
I discovered yesterday that the distributor has some super cheap dry pressure gauges ($15 ea), 0-12 barg. So this project is growing in scope...
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Got a supplier of these so I can see what's available? Building a machine and thinking of predominantly using PTFE.Originally posted by sprezzatura View PostThis is the primary hydraulic line in a C.M.A (Wega Mini-Nova EVD). 1/4" BSB single flares and a brass insert into the 6mm Nylon return tube from the OPV to a PTFE "t" to the inlet to the pump (sort of a self-prime idea I guess).
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Got any pictures of how you fitted it?Originally posted by simonko View PostI slapped a dry pressure gauge on my BZ99s too - more because I didn't have a cap for a unused junction outlet, but it's been handy. Gives me 4 barg when idle, so either it and/or my 350 kPa regulator are/is slightly out. About 10 barg when extracting.
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A pic won't be that helpful as I used a junction I had lying around from another machine, but I took one anyway:

It's the miniature little copper pipe you see, above the solenoid. Water in from the rotary pump via the braided hose, OPV runs off to the left horizontally, one way valve going down to the solenoid tee. I only use the one way valve as a male-to-male adapter, not to prevent backflow which won't happen anyway.Last edited by simonko; 19 August 2016, 03:38 AM.
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