EasyPro DM4 Weighted Air price history, checked Nov 15, 2026: Good price. $128.32 is 9% below the $142.19 it normally sells for, and the lowest we've seen in 142 days.

EasyPro DM4 Weighted Air Diffuser Manifold with Four 6" Membrane Diffusers | Weighted design for easy installation. Includes polyethylene underlay, check valve, strain relief, barb fitting and clamp
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Good price
$128.32 is 9% below the $142.19 it normally sells for, and the lowest we've seen in 142 days.
- Now
- $128.32
- Normally
- $142.19
- Lowest in 142 days
- $128.32(Nov 14)
- Highest
- $142.19
Where today's price sits
Prices change. Confirm the price on Amazon before you buy. TrackPin may earn a commission if you buy, at no cost to you; it never changes a verdict.
Amazon price jumps and real deals, posted on X: @trackpindeals (opens in a new tab)
Price history
Tracked since Jun 25 · 142 days · 15 price changes
Ahead of Black Friday 2026 (Nov 27), it is already 9% below its normal price of $142.19. EasyPro DM4 Weighted Air Diffuser Manifold with Four 6" Membrane… price history, checked Nov 15, 2026: current price $128.32, normal (typical) price $142.19, average $140.92 over 142 days, lowest $128.32 (Nov 14, 2026), highest $142.19 (Sep 21, 2026).
Loading the price chart.
- Price
- Not checked for 3+ days
- Normal $142.19
- 5% or more below normal
How often does it drop below normal?
In the 142 days we've tracked it, it stayed 5% or more below today's normal price for an hour or more 8 times, typically lasting about 2 days. It's below normal right now.
A count of what happened, not a prediction.
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Get this as JSONThe same verdict and prices, from the TrackPin API.
curl https://trackpin.co/api/v1/product/B005OTLHV8 \
-H "x-api-key: $TRACKPIN_API_KEY"const res = await fetch("https://trackpin.co/api/v1/product/B005OTLHV8", {
headers: { "x-api-key": process.env.TRACKPIN_API_KEY },
});
const product = await res.json();
console.log(product.verdict.label, product.price.reference_cents);import os, requests
r = requests.get(
"https://trackpin.co/api/v1/product/B005OTLHV8",
headers={"x-api-key": os.environ["TRACKPIN_API_KEY"]},
)
product = r.json()
print(product["verdict"]["label"], product["price"]["reference_cents"])This is exactly what the API returns for this product. Free keys include 100 requests a day.
Request a key{
"asin": "B005OTLHV8",
"title": "EasyPro DM4 Weighted Air Diffuser Manifold with Four 6\" Membrane Diffusers | Weighted design for easy installation. Includes polyethylene underlay, check valve, strain relief, barb fitting and clamp",
"image": "https://m.media-amazon.com/images/I/41dR+Q6hpoL._AC_SL500_.jpg",
"currency": "USD",
"category": "Pet Products",
"category_label": "Pet Supplies",
"in_stock": true,
"price": {
"current_cents": 12832,
"reference_cents": 14219,
"discount_pct": 9.75,
"is_deal": true,
"observed_at": 1794703613080,
"changed_at": 1794629046632,
"checked_at": 1794703613080,
"source": "stored"
},
"verdict": {
"label": "good",
"text": "Good price",
"pct_vs_normal": 9.75,
"evidence": "strong",
"stale": false,
"suspect": false,
"steady_since": null,
"sentence": "Good price. $128.32 is 9% below the $142.19 it normally sells for, and the lowest we've seen in 142 days."
},
"listing_claim": null,
"stats": {
"min_cents": 12832,
"max_cents": 14219,
"avg_cents": 14092,
"history_days": 142,
"price_levels": 195,
"price_changes": 15,
"distinct_prices": 3,
"lowest_at": 1794629046632
},
"history": [
{
"price_cents": 13508,
"from": 1789182467237,
"to": 1789185662246
},
{
"price_cents": 14219,
"from": 1789383922339,
"to": 1789786185788
},
{
"price_cents": 13508,
"from": 1789787503200,
"to": 1789789236132
},
{
"price_cents": 14219,
"from": 1789989127015,
"to": 1794628012638
},
{
"price_cents": 12832,
"from": 1794629046632,
"to": 1794703613080
}
],
"last_seen": 1794703613080
}
// … 190 more steps in the full responseNormal price: the lowest price level the product held for at least 15% of the last 45 days (about a week). Prices within 3% of each other count as one level, and we use the lowest price in that level. How we calculate it → Prices are observations of amazon.com and may be incomplete or delayed. TrackPin is not affiliated with Amazon.