FIELD KING 190328 Backpack Sprayer, 4 Gallon, with Internal No Leak Pump Design Delivers 150 PSI
Field King
Best for
Best overall
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 1 trusted source
Current price
$88.97
Updated May 16, 2026 · 1 min read
Sources behind this verdict
10 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Field King 190328 is the consensus pick when people on r/lawncare ask which 4-gallon backpack sprayer to buy. Multiple high-trust r/lawncare threads — including the 'which 4 gallon backpack sprayer should I get' and 'what backpack sprayer do y'all recommend' discussions — return the same answer: the internal no-leak piston pump is the feature that matters, because it keeps herbicide off your back and delivers up to 150 PSI without the seal failures that plague cheaper backpacks. Verified-purchase reviewers on Amazon (4.6 stars across 6,662 reviews) and Home Depot echo the comfort-and-no-leak story, with the adjustable straps and wand build quality singled out repeatedly.
What reviewers liked
- Internal no-leak piston pump design repeatedly cited across r/lawncare as keeping chemicals off the user's back
- High verified-purchase volume (6,662+ Amazon reviews at 4.6) corroborates long-term durability
- Up to 150 PSI with included multiple nozzles handles most herbicide, fertilizer and pest applications
- Strong price-to-performance ratio at under $90 vs pro-grade alternatives
Where it falls short
- r/lawncare commenters note it is consumer-grade — pro-tier alternatives like Sprayers Plus are flagged as more durable
- Manual pumping is fatiguing on larger lawns, where reddit consensus shifts toward battery units
- A separate Field King electric variant draws sharp criticism in r/lawncare for tank-bottom dead volume — buyers must confirm SKU
- Some Home Depot verified-purchase reviewers report eventual seal wear after multiple seasons
Across the reviewers we read, the Field King 190328 is the consensus pick when people on r/lawncare ask which 4-gallon backpack sprayer to buy. Multiple high-trust r/lawncare threads — including the 'which 4 gallon backpack sprayer should I get' and 'what backpack sprayer do y'all recommend' discussions — return the same answer: the internal no-leak piston pump is the feature that matters, because it keeps herbicide off your back and delivers up to 150 PSI without the seal failures that plague cheaper backpacks.
Verified-purchase reviewers on Amazon (4.6 stars across 6,662 reviews) and Home Depot echo the comfort-and-no-leak story, with the adjustable straps and wand build quality singled out repeatedly. YouTube hands-on reviews comparing it to budget 4-gallon backpacks generally land in the same place: more expensive units exist, but this is the floor for serious lawn-care work.
The honest counterpoint, voiced inside the same r/lawncare threads, is that it is still a consumer-grade tool. One commenter called it 'a cheaper more disposable option vs Sprayer Plus,' and a separate thread specifically warns against the Field King 4-gallon electric variant (a different SKU) for tank-bottom dead-volume issues. Buyers wanting professional-grade longevity may want to step up; everyone else gets a lot of sprayer for under $90.
- Highlight 1
- Internal No Leak Pump design is safer to use chemicals will not drip down your back. Internal piston pump delivers up to 150 PSI
- Highlight 2
- Durable, 21 inch poly wand with the highest quality Viton seals can be used with Wet table powders and liquids for all applications does the work of both a piston and diaphragm backpack
- Highlight 3
- Premium, lockable shut off with brass components and an in-line filter.
- Highlight 4
- Easy access pump allows changing of seals in just minutes with no tools
- Includes 6 Nozzles
- adjustable brass, high volume wide fan (brown), low volume wide fan (red), low volume narrow fan (yellow), jet stream (orange) and foaming (black). Also accepts TeeJet nozzles.
I also have the Field King and highly recommend it. I like the manual pump which is easy to run and handily keeps up with the sprayer. No leaks ...
I recently used my Field King Max 190348 Backpack Sprayer. It has been a long time so I forgot how to depressurize the system.
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“Field King Backpack Sprayer for Yards Review” · YouTube
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