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Nitrile (NBR) O-Ring Assortment Kit, Metric, ...: 
Universal Filter Strap Wrench for Oil, Fuel a...: Barton WF040034 is the set of wear parts that rebuilds the high pressure end of the Flow mini on/off valve: poppet, seat, dynamic seal, back up ring, bushing and O-rings. It is used on Flow waterjet cutting heads with the mini on/off valve. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
The same part is also sold as AccuStream 1-12544, IWP F300-K0020-0000, Flow 711484-1 and H2O Jet 302001-3.
Sold as one complete set. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Mini On/Off Valve Repair Kit |
| Replaces | Flow 711484-1 |
| Type | Mini on/off valve repair kit |
| Contents | Poppet (needle), seat, dynamic seal, back up ring, poppet bushing, O-rings |
| Not included | Seal removal tool (Flow 014203-1) |
| Supplied as | One repair kit |
| Cross references | AccuStream 1-12544, IWP F300-K0020-0000, Barton WF040034, H2O Jet 302001-3 |
| Condition | New, aftermarket |
| Stat. HS-Code | 848490 |
| Country of Manufacture | China |
| Flow Part No.(SPM Part No.) |
|---|
| 711484-1(SPM-WJP-4959) |
| Brand | Part No. |
|---|---|
| Flow | 711484-1 |
| AccuStream | 1-12544 |
| IWP | F300-K0020-0000 |
| Barton | WF040034 (this page, SPM-WJP-4959) |
| H2O Jet | 302001-3 |
All of these numbers are the same part.
Water will not shut off
A worn seat or poppet lets water dribble from the nozzle when the valve should be closed. The kit replaces the parts that seal.
Leak from the valve body
Water from the weep hole means the high pressure seal and back up ring have worn. Rebuild the valve before the leak erodes the body.
Planned maintenance
On/off valve seals wear with every cycle. Rebuilding on a schedule stops unplanned downtime on a busy machine.
Fitting tips
Bleed the high pressure and the air supply first. Clean the body, fit every part in the kit, use the correct lubricant on the seal, and check the stem travel before running.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| Hennco Waterjet Supply | USD 100.00 | 1 Nov 2026 |
| RockRidge Abrasives | USD 101.00 | 1 Nov 2026 |
| CNCShop | USD 107.00 | 1 Nov 2026 |
| IWP Waterjet | USD 108.00 | 1 Nov 2026 |
| AccuStream | USD 110.00 | 1 Nov 2026 |
| eBay, aftermarket seller | USD 169.99 | 1 Nov 2026 |
| Spare Part Mart | USD 80.00 | Today |
Our price of USD 80.00 is 20% to 53% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it is a direct replacement for the Barton WF040034 with the same fitting.
It depends on hours and working conditions. Follow the machine service schedule, and change it when it shows wear rather than waiting for it to fail.
Leaks, noise, loss of performance, or visible wear compared with a new part. If in doubt, measure it against the sizes in the specifications.
Match the part number on the old waterjet valve repair kit to Barton WF040034 or a number in the cross reference table. If the number is worn off, compare the sizes in the specifications.
Yes. Every order is covered by our 30 day money back guarantee. Keep it unused and in its packaging.
No. It is an aftermarket waterjet valve repair kit made to replace the Barton WF040034. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
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