UltraFlex-3 / 4 Spare Parts FAQs
Straight answers to the questions people ask most when choosing and fitting spare parts for a flexible spring-balanced fume extraction arm.
Why does my arm sag or fail to hold its position?
Extraction arms are usually balanced by springs or similar counterbalance parts and held in place by friction in the joints. A sagging arm often points to a weakened or broken spring, a loosened joint or worn friction parts.
Check the joint tension first, but only if the manual for your arm allows it. Whether springs should be replaced singly or together depends on how your arm is built, so follow the parts list and instructions for your own model. Support the arm before any work, because springs can hold stored force. If you are unsure, use a competent engineer.
Should I replace springs singly or together?
Check the manual and parts list for your own arm, as the right approach depends on the design. Some arms use matched springs that share the load, and fitting a new spring beside an old, tired one can leave the balance uneven so the arm tilts or drifts. Others are designed for single replacement.
If the manual does not say, ask our team or the maker's service department before you start. Springs hold stored force, so support the arm, wear eye protection and gloves, and follow the manual's steps. If you are not confident, use a competent engineer.
What are the inner tubes and why do they need replacing?
The inner tubes are the rigid sections of the arm that carry the airflow and the joints. They can bend, dent or corrode from knocks, heat and age. The tube material differs between arm designs, so check the data plate and manual for your own machine rather than assuming.
A bent tube stops the arm moving smoothly and can leak. Choose the tube listed in the parts list for your arm and for the correct position, whether that is the hood side or the wall or unit side.
How do I know when to replace the hose pieces?
Replace a hose piece if you see tears, burn marks, collapsed sections, or loose ends. Flexible hoses are often made in pieces for the hood, middle and wall ends, so you only need to replace the damaged one.
Make sure that the replacement has the correct diameter and fittings. A damaged hose cuts suction and lets fume escape.