21/30441565 DC BS EN 13077. Devices to prevent pollution by backflow of potable water. Air gap with non-circular overflow (unrestricted). Family A. Type B - European Standards
![21/30441565 DC BS EN 13077. Devices to prevent pollution by backflow of potable water. Air gap with non-circular overflow (unrestricted). Family A. Type B - European Standards 21/30441565 DC BS EN 13077. Devices to prevent pollution by backflow of potable water. Air gap with non-circular overflow (unrestricted). Family A. Type B - European Standards](https://www.en-standard.eu/imgcache/3/4/pi449-21-30441565-dc-21-30441565-DC-BS-EN-13077-Dev_260_260_327021.jpg)
21/30441565 DC BS EN 13077. Devices to prevent pollution by backflow of potable water. Air gap with non-circular overflow (unrestricted). Family A. Type B - European Standards
![Development and electrical distribution of water power . Ground Fig. 68. type. This is made of ordinary copper wire size No. 000, bentin the form shown in Fig. 68. Two of Development and electrical distribution of water power . Ground Fig. 68. type. This is made of ordinary copper wire size No. 000, bentin the form shown in Fig. 68. Two of](https://c8.alamy.com/comp/2CHT6JR/development-and-electrical-distribution-of-water-power-ground-fig-68-type-this-is-made-of-ordinary-copper-wire-size-no-000-bentin-the-form-shown-in-fig-68-two-of-these-bent-pieces-supportedon-insulators-form-an-arrester-one-horn-is-connected-to-a-line-wirewhile-the-other-is-connected-to-the-ground-through-a-fuse-the-dimensions-given-in-the-figure-are-those-for-a-5oooo-volt-lightning-protection-j39-system-for-smaller-potentials-the-air-gap-between-the-horns-iscorrespondingly-diminished-a-simple-and-effective-form-of-arrester-used-in-europe-com-prises-a-plate-of-copper-attached-2CHT6JR.jpg)
Development and electrical distribution of water power . Ground Fig. 68. type. This is made of ordinary copper wire size No. 000, bentin the form shown in Fig. 68. Two of
![ONORM EN 13077:2004 - Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A, type B (FOREIGN STANDARD) ONORM EN 13077:2004 - Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A, type B (FOREIGN STANDARD)](https://webstore.ansi.org/cover-pages/small/ON/ONORM%20EN%2013077_2004.jpg)