Why this product
The Drinkwell Multi-Tier is the version of PetSafe’s fountain that solves the two real problems with the Original: capacity and pump noise. The 100 oz reservoir is double the Original’s, which means refilling every 2 to 3 days instead of every 1 to 2 days for typical multi-pet households. The pump runs quieter, per consistent owner feedback comparing the two models.
The two drinking tiers are the more visible upgrade. The upper tier is positioned at cat height, the lower bowl at dog height. In multi-pet homes this is genuinely useful, a cat can drink from the upper level without sticking its head into a low dog bowl, and a large dog has a comfortable lower bowl at floor level.
The rest of the design carries over from the Drinkwell line. Free-falling stream from the top spout, replaceable carbon filter at the inlet, dishwasher-safe top components, and BPA-free plastic construction throughout.
For owners with one small pet, this is overkill. The Mini or Original is the right scale. The Multi-Tier is built specifically for households with a large dog, multiple pets, or both.
For our full pet tech framework, see methodology. For the smaller single-tier sibling, see our PetSafe Drinkwell Original review.
What PetSafe claims
PetSafe claims 100 oz (3 L) of capacity. The published spec matches actual reservoir volume across the upper reservoir and combined bowl space.
PetSafe claims two drinking tiers. The upper tier is small (cat-sized), the lower bowl is larger (dog-sized). Owner reviews back up that pets self-select tiers, especially in multi-pet homes where a cat will use the upper level and a dog the lower.
PetSafe claims a quieter pump than earlier Drinkwell models. Owner comparisons in reviews consistently echo this. The pump itself is a similar low-voltage submersible design, but the housing and water flow path appear better tuned for noise reduction.
PetSafe claims a replaceable activated carbon filter, the same cartridge as the Original and Mini. Filter service life is 2 to 4 weeks per PetSafe’s recommendation.
PetSafe claims dishwasher-safe parts (top reservoir, bowl, ramps). The pump must be hand washed, with full disassembly cleaning every 2 to 4 weeks per the brand’s recommendation.
PetSafe claims BPA-free plastic construction. The body is opaque plastic, the bowl and ramps are separate molded parts.
Who should buy the Drinkwell Multi-Tier
Buy this if you have multiple pets sharing a single water source. The two drinking tiers let cats and dogs use the fountain without competing.
Buy this if you have a large dog. The 100 oz capacity is appropriate for a single large dog’s daily drinking, and the lower bowl is the right height.
Buy this if you want less frequent refilling. Going from 50 oz to 100 oz roughly doubles refill intervals for the same pet count.
Buy this if pump noise has been an issue with previous fountains. The Multi-Tier runs quieter than the Original per consistent owner feedback.
Skip this if you have one small to medium pet. The Original at $49 covers that need.
Skip this if counter space is tight. The Multi-Tier has a meaningfully larger footprint than the Original or Mini.
Skip this if you want stainless steel construction. The entire Drinkwell line is plastic.
Capacity and the two-tier design
The 100 oz reservoir is the structural upgrade. For a multi-cat household, this is roughly 3 to 4 days between refills. For a large dog, it is 1 to 2 days. Either way, it is meaningfully less work than the Original.
The two-tier design is the secondary upgrade and is more useful than it looks at first glance. In a household with both cats and dogs, the bowls become tier-specific over time, the cats default to the upper level, the dog defaults to the lower. This reduces water mixing (cat saliva in the dog bowl, etc.) and gives smaller pets a more comfortable drinking height.
Pump noise and water freshness
Owner reviews consistently flag the Multi-Tier pump as quieter than the Drinkwell Original. The improvement is real and noticeable, the fountain runs at a level that is closer to ambient room noise rather than a distinct hum.
The free-falling stream design is unchanged from the rest of the Drinkwell line. Water is pumped to the top spout, falls down dual ramps to the upper tier, then cascades into the lower bowl. The motion aerates the water, which is the consumer-fountain hydration pitch PetSafe applies across the line.
Filter and cleaning
The Multi-Tier uses the same replaceable activated carbon filter as the Original and Mini. PetSafe rates each filter at 2 to 4 weeks. Bulk filter packs are widely available, which keeps the per-filter cost predictable.
Cleaning runs the same protocol as the rest of the line: weekly cleaning of dishwasher-safe parts (top reservoir, bowls, ramps), and full pump disassembly every 2 to 4 weeks. Skipping the pump clean is the single most common reason a fountain runs loud or eventually fails, biofilm builds up on the impeller and degrades flow.
Build and footprint
Construction is BPA-free plastic across the body, bowls, and ramps. Build quality is solid and the parts are widely available for replacement. The footprint is the main physical trade-off versus the Original or Mini, the Multi-Tier needs more counter or floor space and a clear path to a power outlet for the wired pump.
PetSafe Drinkwell Multi-Tier Pet Fountain vs. the competition
| Product | Our rating | Capacity | Tiers | BestFor | Price | Verdict |
|---|---|---|---|---|---|---|
| PetSafe Drinkwell Multi-Tier | ★★★★★ 4.5 | 100 oz | 2 | Large or multi-pet | $79 | Top Pick Fountain |
| PetSafe Drinkwell Original | ★★★★☆ 4.4 | 50 oz | 1 | Single dog, multi-cat | $49 | Best Budget Fountain |
| PetSafe Drinkwell Mini | ★★★★★ 4.5 | 40 oz | 1 | Small dog or cat | $35 | Best for Small Pets |
| Catit Design Senses 3L | ★★★★☆ 4.4 | 100 oz (3 L) | 1 | Cats | $39 | Recommended |
Full specifications
| Capacity | 100 oz (3 L) |
| Tiers | Two drinking levels |
| Stream | Free-falling, dual ramp |
| Filter | Replaceable activated carbon |
| Filter life | About 2 to 4 weeks (PetSafe claim) |
| Pump | Submersible, low voltage |
| Power | Wired AC adapter, low wattage |
| Material | BPA-free plastic |
| Dishwasher safe parts | Top reservoir, bowl, ramps |
| Best for | Multi-pet households, large dogs |
Should you buy the PetSafe Drinkwell Multi-Tier Pet Fountain?
The PetSafe Drinkwell Multi-Tier is the right pet fountain for multi-pet households. PetSafe lists 100 oz of capacity (double the Original) split across two drinking levels, the same free-falling stream design, and the same replaceable carbon filter. The pump is quieter than the Original, which is the second reason to step up.
Frequently asked questions
Is the Drinkwell Multi-Tier worth $79 in 2026?+
Yes for multi-pet households or homes with a large dog. The 100 oz capacity means refilling every 2 to 3 days for most setups, and the two drinking tiers let smaller pets drink without crouching. If you have one small to medium pet, the Original at $49 is the better value.
Multi-Tier vs Drinkwell Original: which is right?+
The Multi-Tier doubles capacity (100 oz vs 50 oz) and adds a second drinking level. It also runs a quieter pump per owner reports. If you have a large dog, multiple pets, or want less frequent refilling, the Multi-Tier is the upgrade. Otherwise, the Original is fine.
What's the point of two tiers?+
Different pet heights. A cat or small dog can drink from the upper tier without crouching, while a large dog uses the lower bowl. In multi-pet households this avoids one pet blocking another at a single bowl.
How often do I need to clean it?+
PetSafe recommends weekly cleaning of dishwasher-safe parts (top reservoir, bowl, ramps) and full pump disassembly every 2 to 4 weeks. Skipping pump cleaning is the most common reason fountains start running noisy or fail.
Does it use the same filters as other Drinkwells?+
Yes. The Multi-Tier uses the same replaceable activated carbon filter as the Drinkwell Original and Mini. Bulk filter packs are widely available.
📅 Update log
- May 9, 2026Refreshed comparison table with current pricing across the Drinkwell line.
- May 30, 2025Initial review published.
Related reviews
Catit Design Senses Drinking Fountain Review (2025): The 3L Cat Fountain That's Earned Its Following
PetSafe Drinkwell Mini Pet Fountain Review (2025): The Compact 40 oz Fountain Built for Small Pets
