Bar screens and bellows: what they have in common

1. Step 1. Bar screens — is part of — Sewage treatment plant. They catch large debris.
2. Step 2. Sewage treatment plant — is part of — Sewerage. Treatment plants.
3. Step 3. Sewerage — is used in — Flush toilet. Draining the waste.
4. Step 4. Flush toilet — has part — Valve. The cistern’s float valve.
5. Step 5. Valve — is part of — Bellows. A valve in the bellows lets air in when they open and keeps it from escaping back.

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