We're using coolie caps for our installations at this point and of course they are a very robust solution. We typically make them in house.
That said, Chemlink makes a product called DuraSil which is supposidly good up to 400F and compatible with copper: http://www.chemlinkinc.com/docs/datasheets/chemlink_durasil.pdf They are coming out with a self leveling version of this product that will work in a Chemcurb. Might be a good option for flat roofs. -August *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto: re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Bill Loesch *Sent:* Wednesday, June 09, 2010 10:36 AM *To:* RE-wrenches *Subject:* Re: [RE-wrenches] solar hot water penetration flashing The coolie caps are really just regular (oversized) caps which have been punched out to snugly accommodate the pipe to be sealed. Tom Lane's book, Solar Hot Water Systems, Lessons Learned ..., addresses this sealing method and many more. AET Solar in Jacksonville, FL stocks this item as well as almost anything solar thermal you could want. One solution for exposed rubber or (more precisely) the filler bushing seal on the combination metal / flexible insert seal Oatey style flashings is paint. One meticulous homeowner had done that on his '80's vintage system and the flexibility of the seal was just like new. He identified it as latex paint. I would want to be very sure that whatever I used on that flexible material was compatible for many many years since unlike a typical plumbing flashing which can be relatively easily replaced by simply inserting the seal over the end of the vent, the loop of pipe, common with SDHW does not allow that luxury. Bill Loesch Solar 1 - Saint Louis Solar ----- Original Message ----- *From:* Nik Ponzio <npon...@buildingenergyus.com> *To:* RE-wrenches <re-wrenches@lists.re-wrenches.org> *Sent:* Wednesday, June 09, 2010 10:05 AM *Subject:* Re: [RE-wrenches] solar hot water penetration flashing This is an on-going problem, apparently. We were getting the coolie cap fittings from EFI but they got out of the solar business recently. Does anyone have a source for these now? Thanks in advance. -- Nicholas Ponzio NABCEP Certified Photovoltaic Installer Building Energy 1570 South Brownell Road Williston, VT 05495 t: 802-859-3384 x15 f: 802-658-3982 c: 802-365-1973 www.BuildingEnergyVT.com On Wed, Dec 10, 2008 at 9:24 PM, Karl Schwingel < k...@northwindrenewable.com> wrote: I use similar boots, and design the penetration so the insulation and wrap ( we use aluminum) nearly cover the whole boot by the time you're all done. you're left with about 1/2" of boot showing all the way around. where can I get the coolie cap style brazed copper flashings? karl Todd Cory wrote: I use accordion style rubber boots. These are typically attached to the roofing with a bead of silicone underneath and gasketed metal roofing screws on top. These are made for all kinds of metal roof penetrations and I have even seen them used for 6" metalbestos stove flues. One note of caution, the orange "high temperature" ones are (I think) rated only to 180 degrees F. so you want to make sure the SHW fluid never exceeds this. Also in time, like any rubber flashing on a roof the rubber will deteriorate from UV. I build a show shed over my system's plumbing which shades it so hopefully this will not be in issue in ~20 years. Todd troy Harvey wrote: Any thoughts on how to flash a copper pipe roof penetration on a metal roof. The brazed copper flashing we typically use would cause corrosion with the steel roof I'm afraid. WHat have others used in this situation? Troy Harvey --------------------- Heliocentric 801-453-9434 tahar...@heliocentric.org <mailto:tahar...@heliocentric.org> ------------------------------------------------------------------------ _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org -- Karl Schwingel NABCEP Certified Solar Thermal Installer NorthWind Renewable Energy LLC PO Box 723 Stevens Point, WI 54481 k...@northwindre.com Cell: 715 209 0446 Fax : 715 952 4501 This e-mail message is confidential, is intended only for the named recipient(s) above, and may contain information that is privileged or exempt from disclosure under applicable law. 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