The GIACOMINI A59 is a line-tester: a brass unit fitted on the end of sprinkler branch lines to flush the system. It has an outlet that fits a 1/2″ sprinkler head, and a chained cap that is removed to open the end of the line.
In short
- Size 1″ × 1″ × 1/2″.
- Rated pressure 175 psi.
- Fits a 1/2″ sprinkler head.
- FM and cULus marks on the catalogue page.
What it does
After installation or any modification, swarf, scale and dirt collect in branch lines. Removing the cap opens the end of the line so it can be flushed until the water runs clear, then the cap is refitted. The unit avoids removing a sprinkler or fitting for every flush.
Technical data
| Item | Value |
|---|---|
| Model | A59 |
| Size | 1″ × 1″ × 1/2″ |
| Rated pressure | 175 psi |
| Dimensions | A 1-11/32″ · B 2-3/16″ · C 4″ · D 1-1/2″ · E 1-9/32″ |
| Approvals | FM and cULus per the catalogue page |
The critical point: refit the cap after flushing
After flushing, refit and tighten the cap and check for leaks before returning the system to service. The chain stops the cap being lost.
Installation steps
- Fit the unit at the end of the branch line with sealant on the thread.
- Fit the sprinkler in the 1/2″ outlet where one is required at that point.
- To flush: isolate the zone, remove the cap, run a hose to a drain, and flush until the water runs clear.
- Refit the cap and check tightness.
Common mistakes
- Flushing without directing the water to a drain.
- Leaving the cap loose after flushing.
Inspection and maintenance
Flush per NFPA 25 where there are signs of obstruction or after modifications, and check the cap and chain.
Inspection, testing and maintenance are the owner’s responsibility per NFPA 25 and the authority having jurisdiction, preferably by a qualified company. Notify the owner, the monitoring station and everyone affected before any test.
Files and ordering
The GIACOMINI catalogue page for the A59 are in the files section of this page. When ordering, state the quantity and finish.
How to order
Use the “Build your order” section on this page: add every model and quantity, then send the whole order by email or WhatsApp. It reaches us as a tidy PDF request sheet and we contact you with the quotation.
FAQ
Is it the same as a test and drain valve?
No. The A61 tests the flow switch and drains the zone; the A59 flushes the end of a branch line.
References
- GIACOMINI A59 — Datasheet (attached)
- NFPA 13 — Standard for the Installation of Sprinkler Systems
- NFPA 25 — Inspection, Testing and Maintenance of Water-Based Fire Protection Systems
This page is general information to help with selection and ordering, taken from the attached GIACOMINI datasheet. Final design is set by the project’s approved designer; the project specification, the consultant’s drawings and the latest datasheet revision govern.
