yagerboy December 2, 2011 December 2, 2011 I accidentally broke off a connector to my RO housing unit, so purchased a new housing membrane and filters. My old unit was rated for 50 gpd but all I could find was 75gpd. Now, when I turn the water on, it is not going through the membrane and seems to be going directly out of the waste (red) hose. Any ideas why this is happening? The housing is rated for 75gpd and seems to fit in nicely. I marked the in/out from the old unit as to not switch around. The holes are a little different and I used a different connector. Could this be the issue? TIA!!
Guest thefishman65 December 2, 2011 December 2, 2011 Does the new system have a flush valve? Turn it the other direction.
hypertech December 2, 2011 December 2, 2011 Sometimes the flow restrictors are built into the housing. Are you sure you still have the appropriate flow restrictor installed in the right place after you replaced the housing?
yagerboy December 2, 2011 Author December 2, 2011 There is no flush valve. IIt seems like the flow restrictor is built in. I will try that, thanks.
zygote2k December 2, 2011 December 2, 2011 Flow restrictors aren't "built-in". They are usually found in the waste line coming out of the membrane. These are the internal types. There is an external flow restrictor that looks like a coupling, but has a number on it and may or may not have arrows pointing for flow direction. When you buy a membrane, always get the right size restrictor.
hypertech December 3, 2011 December 3, 2011 Yes they are built in sometimes. On some units they are installed directly into the output of the housing. Sometimes inside the housing and sometimes looking like a right angle adapter. If you have one of those rather than the more obvious inline type, you need to find it, remove it, and replace it with one that matches the flow rating of the membrane.
Origami December 3, 2011 December 3, 2011 Yes they are built in sometimes. On some units they are installed directly into the output of the housing. Sometimes inside the housing and sometimes looking like a right angle adapter. If you have one of those rather than the more obvious inline type, you need to find it, remove it, and replace it with one that matches the flow rating of the membrane. And sometimes it's a little piece of narrow tubing press-fit into another longer length of tubing such that you'd hardly know it's there....
YBeNormal December 3, 2011 December 3, 2011 Ah yes, I've seen those. Little inserts inside of the tubing that you don't even know are there.
Origami December 3, 2011 December 3, 2011 Ah yes, I've seen those. Little inserts inside of the tubing that you don't even know are there. Calibrated right, it's a good source of resistance to water flow that's dirt cheap.
Buucca December 3, 2011 December 3, 2011 There are capillary flow restrictors that are inside the flex tubing. There is a inline FR and another one (the name illudes me). Normally the right angle fitting on the drain output of the membrane housing is a check valve.
zygote2k December 3, 2011 December 3, 2011 There are capillary flow restrictors that are inside the flex tubing. There is a inline FR and another one (the name illudes me). Normally the right angle fitting on the drain output of the membrane housing is a check valve. The cap flow restrictors are the type that I'm referring to as internal FR's. I usually see these in the 90 degree fitting on the waste line of the membrane housing. Maybe one of you geniuses (or is that geni) can post a diagram in a pinned section that shows all of the parts of a typical R/O D/I?
Origami December 3, 2011 December 3, 2011 I don't know about pinning it, but here's one that I drew up of a Typhoon III-like configuration:
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