Support for Z-Flex in exterior chase - Thoughts? (Bob Morrison)

Bob Morrison_3

What's a good means of supporting gas vent pipe in an exterior chase?

Situation: existing 3" Z-flex vent, side-wall vented from a gas-fired, induced draft, residential boiler located in basement. New vent will connect to existing and rise in an exterior chase up 10 feet, then elbow out of the chase to a termination tee. Total equivalent length is approx. 18'.

How should the vent be supported in the chase?

Thanks in advance!

Bob

PS: I'll be attending Siegenthaler's hydronic design seminar in Marlborough, MA on July 16th. Anyone else?

S Ebels

Maybe

Can you find a Vent-Fast that will accomodate the O.D. of the Z-flex?

Dale

zflex

Interesting problem,usually you don't support it at all but if your chase is wood the clearance must be maintained. Using a insulating wrap would help and then make some sheet metal standoffs over that. Try www.z/flex.com and see what they say.

Bob Morrison_3

I spoke to Z-Flex

Z-Flex recommended supporting the pipe with non-corrosive plumbers strap. The strap can be nailed to wood if clearances to the vent pipe (4") are maintained. Doesn't seem like an elegant solution. I was hoping for some type of stand-off hanger...

hr

Most vent manufactures

offer some sort of standoff bracket or floor penetration plate. You may have to shop in the B vent parts list to find one and make sure the diameters work out.

Or custom build some with galv sheet stock.

When I run PVC vent pipes up like that I use regular riser clamps, but that may be over kill for you job. good luck

hot rod

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Mike Kraft_2

How about............

fire stops with clamps on them.Most all manufacturers offer these for the 3" rigid AL29-4C pipe.Something like that spaced will center it and offer support.

cheese

Robert O'Connor_7

Why not...

Fabricate one. I do it alot. I've not found a manufacturer that makes the one universal. Get a hunk of angle iron & your welder. Or how about a large riser clamp w/threaded rod into the structure????...Robert O'Connor/Nj

ScottMP

Bob

I'll be going to Siggys class and I look forwad to seeing you again. I think the last time was the gas seminair almost five years ago. I think it was the first time I meet Noel and Chuck.

Scott

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tim smith_2

supports

what about a piece of strut with angle bracket bolted to strut and structure, then a 2.5" ridgid pipe strut clamp to hold vent. Very sturdy.

Doug Wagoner

screw two 1/4\" threaded rods into the wall spaced 4\" apart

use perforated hanger iron to fab a riser-clamp arrangement with holes aleigned to slip over the threaded rods. Sandwich the iron between two nuts and washers. It will grip the pipe and give you any required stand off from the wall. With the approperate anchors this arrangement can be adapted to just about any wall materials. I have used this arrangement to support verticle piping that requried a clearance many times. By jumping up to 3/8" or 1/2" rods, and of course heaver clamping arrangements, it is possible to support very heavy loads.