Spec-by-spec
Head to head
Contenders from Automatic Pet Water Fountains, every metric lined up. The winning value in each row is outlined.
PetSafe Multi-Tier Pet Fountain 100oz – Accessible Two-Height Waterer for Senior Pets #3 in Automatic Pet Water Fountains 
PetSafe Drinkwell 360 Stainless Steel Pet Fountain — 128oz Multi-Pet #14 in Automatic Pet Water Fountains Price
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Rating
★★★★★
★★★★★
Category rank
#3
#14
Filtration Quality
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Reservoir Capacity
100oz – ample for 1–2 pets, 2–3 days typical
128 oz—ideal for multi-pet households
Pump Noise
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Ease of Cleaning
Top-rack dishwasher-safe; moderate assembly required
Multiple parts, fairly easy to clean
Verdict
Best multi-tier fountain for senior & arthritic pets
The established multi-pet standard
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