*PLUMBERSSTOCK EXPERT* responded:
Hi! Thank you for asking help from the PlumbersStock team! Unfortunately, we weren't able to find the answer to your question. We have contacted Elster Perfection and we hope to hear from them soon. Please check back in with us at a later time, or leave your email address below and we can contact you as soon as we have the answer. However, if this may be of help, the Elster Perfection 79408 has a threaded steel outlet of 1" NPT and a PE tubing of 1" IPS. This Permasert inlet type has a PE tubing SDR/Wall thickness of SDR 11. Please refer to this Product Catalog. We hope this helps. Should you have further questions, please don't hesitate to ask us. We will be happy to assist you! Thank you for visiting PlumbersStock.com. Have a great day!