IMG_1996 Published 2016-05-08 at 1000 × 750 in Week 29, Day 4 FIrst-fix of the low-loss header in the Plant Room feeding the three heating circuits via Honeywell zone valves and Grundfos Alpha2 pumps IMG_1996 by Marsh Flatts Farm Self Build Diary is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.