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![Caleffi cap valve 558050 3/4" x 3/4", for checking expansion tanks](https://www.obadis.com/media/catalog/product/cache/8b2baba0df5eeeb6d702a120e26eac81/k/a/kataloge_caleffi_vgabild_5580_opt.jpg___/Caleffi-cap-valve-558050-3-4andquot;-x-3-4andquot;,-for-checking-expansion-tanks.jpg "Caleffi cap valve 558050 3/4" x 3/4", for checking expansion tanks")
