Can I use couplings for grooved-end pipe in foam systems? (solution 97% water and 3% foam concentrate, couplings are similar to Victaulic 005)
Is this permitted by the NFPA 11 standard?
NFPA 11 does allow the use of grooved joints. I have used grooved joining on two projects (2007 and 2012) and have yet to hear about any problems with the joints.
Keep in mind that unless the system is a pre-primed wet type, the gasket wont be in constant contact with foam solution. If it is a concern, you can flush the piping with water to remove any foam solution left after system flow tests.
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