Y-strainer before main vent - 20 mesh OK?

Ken_40

of that quote from Dan?

In the forty years I've worked on steam I have never seen a wye strainer before a main vent. Nor would I advise one now.

The water that would collect in the clean-out would be just like a puddle in the main.

The installation of main vent(s) at the end of the main is problematic. The solution is to mount the end-of-the-main vent at least 12" from the actual, physical "end" - on a tee. This prevents steam driven condensate from "crashing" into the tee - incorrectly how many did it - and shooting up with enough force to "toast" the vent's fragile guts; rendering the vent useless and leaking for the next 20 years.

Even the best of the dead men installed the vent tees at the end of the main, creating a bull-headed arrangement that was sure to blow the vent up in short order. Some even tried to stick a 12" nipp up to the coupled vent, to avoid this dynamic - to no avail.

Take a look at page 85 of TLAOSH.

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David Nadle

Last minute question

Well, my boiler replacement is scheduled to start Monday, and I have a last minute question. Last minute jitters too.

The exisiting mains never had a vent, so we're adding one. I saw Dan's advice on using a Y-strainer to protect it. Is the (apparently standard) "20 mesh" OK?

gerry gill

if you use a wye strainer

it will have to be vertical up..you may or may not have room for this..i never seem to.

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David Nadle

The source...

http://www.heatinghelp.com/newsletter.cfm?Id=165

I beleive the suggestion is put the y strainer near the end of the nipple.

Even though I will probably end up without a y-strainer--for me to bring this up with my installer feels like extreme micromanagement--I'm still curious...will 20 mesh be effective in this situation or do you go finer?