Harbor Freight prices › Air Tools & Compressors › Air Compressor Accessories
MERLINitem 70939
1/4 in. NPT Air Flow Control Valve with Gauge
Base price$14.99
Members' price$8.99$6.00 off the shelf price (40%)
Everyone else$14.99
Middletown, OH shelf$14.99same shelf price as online 2 more stores
Bartlesville, OK shelf$14.99same shelf price as online 2 more stores
Benton Harbor, MI shelf$14.99same shelf price as online 2 more stores
$14.99 is about its normal price.
$8.99 is 40% under its usual $14.99 and the lowest it's been.
- This deal ends Dec 3.
- Nothing in its past year points to a better price coming soon.
-
Inside Track Club members
$8.9940% off
Through Dec 3, 2026, limit 4. See it on Harbor Freight's coupon site
Automatic for members: sign in online, or give your member number at the register.
Buy $8.99 is 40% under its usual $14.99 and the lowest it's been.
Price alert
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The numbers
- Today
- $14.99
- Usual price
- $14.99
- 90-day low
- $12.74
- Lowest tracked
- $11.99
- Ani equivalent
- $40.59
- Today, members
- $8.99
- Usual for members
- $14.99
- 90-day low
- $8.99
- Lowest tracked
- $8.99
- Ani equivalent
- $40.59
Apr 23, 2026
Nov 5, 2026
Prices by store
Harbor Freight prices some items differently by store, and once you pick a store its site shows that store's shelf price. These come from contributors who share their store; the main price above is the base price, the one HF shows before you pick a store.
| Store | Today | Usually |
|---|---|---|
| Bartlesville, OK store 3021, checked Oct 21, 2026 | $14.99 | $14.99 |
| Benton Harbor, MI store 583, checked Oct 17, 2026 | $14.99 | $14.99 |
| Middletown, OH store 3366, checked Oct 30, 2026 | $14.99 | $14.99 |
Price history
Best price for anyoneInside Track Club priceRegular price
Every price change
| When | Price | Members | Why |
|---|---|---|---|
| Nov 2, 2026 to Nov 5, 20264 days, checked 3x | $14.99 | $8.99 | Regular price |
| Oct 30, 2026 to Nov 1, 20263 days, checked 3x | $12.7415% off | $8.99 | 15% off any single item (one item a day) |
| Oct 29, 20261 day, checked 0x | $14.99 | $12.74 | Regular price |
| Jul 4, 2026 to Oct 28, 2026117 days, checked 2x | $14.99 | Regular price | |
| Jun 6, 2026 to Jul 3, 202628 days, checked 0x | $14.99 | $10.99 | Regular price |
| May 2, 2026 to Jun 5, 202635 days, checked 0x | $14.99 | Regular price | |
| Apr 24, 2026 to May 1, 20268 days, checked 1x | $14.99 | $9.99 | Regular price |
| Apr 4, 2026 to Apr 23, 202620 days, checked 0x | $11.99 | $9.99 | Regular price |
| Jun 27, 2025 to Apr 3, 2026281 days, checked 1x | $11.99 | Regular price |
Tracking since Oct 17, 2026. Last checked Nov 4, 2026.