A solution pump that will not shut off after you release the wand trigger, or that chatters rapidly instead of holding steady pressure, usually has a failed pressure switch rather than a failed pump. The Sandia 10-0812-A is the genuine Aquatec 120 PSI pressure switch for the demand pump fitted to Sniper extractors, and swapping it is a fraction of the cost and downtime of replacing the complete pump.
Carpet cleaning owner-operators and restoration techs reach for this part when the machine still sprays but behaves badly: the pump cycles on and off in fast bursts, holds pressure poorly, or keeps running with the trigger closed and slowly heats the solution line. Because the switch sits on the upper housing of the Aquatec pump, it is one of the more accessible repairs on the machine and does not require pulling the pump body apart.
Built for
- Sandia Sniper extractors running the Aquatec demand pump with integral pressure switch
- Owner-operators who want the cheapest correct fix before committing to a full pump replacement
- Service techs diagnosing rapid pump cycling, no shutoff, or unstable spray pressure
- Shops keeping a small spare-parts kit on the truck for in-field repairs
When to replace it
- Pump keeps running after the wand trigger is released and will not shut off
- Pump short-cycles or chatters rapidly instead of building and holding pressure
- Spray pressure surges and drops while the wand trigger is held open
- Pump fails to start on demand even though it has power and the tank is full
- Solution line heats up because the pump never unloads
Installation and service notes
Diagnose before you replace. Isolate the switch by confirming that the pump has power and the wet end still moves water. If the pump runs and pushes solution but will not shut off or regulate, the switch is the likely fault. If the pump is silent with power applied, look at the motor end instead.
Always disconnect the machine from mains power and relieve solution pressure by squeezing the wand trigger before opening the pump compartment. Note the orientation and wire routing before removing the old switch so the replacement seats the same way.
This switch is factory set. Do not attempt to raise the cut-out pressure to chase more spray force. Running the wet end above its rated pressure shortens diaphragm and valve life and will not clean carpet any faster than the wand jets can deliver.
Specifications
- Sandia OEM part number 10-0812-A
- Component: Aquatec demand pump pressure switch
- Rated pressure: 120 PSI
- Function: senses line pressure and cycles the pump on demand when the wand trigger opens
- Fits: Sandia Sniper extractors equipped with the Aquatec demand pump
Frequently asked questions
How do I know the switch is bad and not the whole pump?
If the pump runs and moves water but never shuts off, cycles in rapid bursts, or cannot hold steady pressure, the switch is the usual cause. A pump that is silent or that hums without moving water points to the motor or the wet end instead.
Can I adjust the switch to get more spray pressure?
No. The switch is factory set for the pump it is fitted to. Raising it stresses the diaphragm and valves and will not improve cleaning, because the wand jets limit flow, not the switch.
Do I need to replace the upper housing at the same time?
Not usually. If the housing itself is cracked, weeping, or the switch boss is damaged, the Aquatec upper housing assembly kit is the correct repair. Otherwise the switch alone is enough.
Is this the genuine Aquatec switch?
Yes. This is the Sandia OEM 10-0812-A supplied through an authorized Sandia dealer.
Discount Cleaning Products is an authorized Sandia dealer. We stock genuine Sandia service parts, not aftermarket substitutes, so the part you install matches the part that left the factory and your machine warranty stays intact. Our US-based staff work on this equipment every day and can help you confirm the right part number against your machine's serial plate before you order.
